Below is a list of phrases, many of which are transition phrases. Go through this list sequentially. For each phrase, decide if it's suitable for casual/everyday/snappy American English conversations.

I want the result in tabulated form:
Column1: serial number
Column2: original phrase
Column3: verdict on the phrase which can be one of the three: 1. Okay - Already casual, 2. Okay but there's a better casual alternative, 3. Formal/awkward/stilted
Column4: alternative to original phrase. Suggest alternative(s) "only and only if" verdict is one of 2 or 3 above in column3. 

I was pleasantly surprised
I was thrilled to find
It should come as no surprise
No shocker there
It's not unexpected
It's no shock
While this may come as a surprise
Even if it's a shock
Even if it's a surprise
Not too shocking that
Not all that surprising
Even more shocking
I'm skeptical
This, in turn,
As I laid out
Like I brought up
Like we went over
Like I mentioned
Like I mentioned earlier
Like we spoke about earlier
Like I said earlier
Like I said before
Like I said
As I was saying
Like I've been saying
Like we discussed
As I've explained
To get back to what I was saying
To pick up where we left off
To continue from where we left
To circle back
Back to my earlier point
Back to what I said before
To come back to that
To rewind a bit
To go back for a second
To go back to an earlier point
As I was saying before
Going back to what I said
To backtrack a little
To take a step back
Looking back on what was said
Thinking about what was said
From what we've talked about
So far, we've talked about
Till now, we've discussed
From our talk
From our chat
As I pointed out earlier
I mentioned before
I brought up earlier
One more time
Just to repeat
Once again
Let me say that again
It's worth repeating
Pointing out again
Bringing up again
Just to reiterate
Don't mean to repeat myself
Sorry to repeat myself
Again,
Yet again
To recap what we discussed
To quickly recap
Let's think about it again
Let's revisit this
Let's take another look
After checking again
After a second look
Let's go over that again
This backs up
This confirms
In other words
The same can be said
The same goes
It's the same story
I'd say
I'd go with
Let me just say
I gotta say
Let me put it this way
It seems like
Seems to be
Looks like
The study says
Enough said
Say no more
Case closed
Think about
You might also consider
You could try
Maybe think about
Looks like the best move is
Probably the smartest move is
The best bet might be
Your best shot could be
You could also look into
Another option could be
I encourage you
I'd say go for it
Give it a shot
This goes hand in hand with
This pairs well with
This dovetails well with
This fits right in with
Often, though,
But a lot of times
More often than not
My gut feeling
My instinct
My hunch
Here's now
The way to
A real-life example
In real-life
There are growing questions
At first glance, it seems
On the surface, it looks like
I'd also recommend
I'd also throw in
How about we
What if we
How about
What about
Why not
I'd really suggest
In this instance
In this case
In this scenario
This doesn't mean that
This doesn't necessarily mean
Some folks say, for instance,
Some say
The surest way
The safest bet
The one thing we know for sure
One thing's for sure
What we definitely know
To be straight
If I've got this right
If I'm getting this right
If I'm on the right track
Be careful
Watch out
Keep an eye out
That's when it'll make sense
That's when it'll click
That when it'll add up
The word is
Word on the street is
Rumor has it
I really hope
For anyone
For anyone out there
For those who
Come to think of it
Now that I think about it
If I remember correctly
If I recall right
Thinking back
When I think back
I sort of remember
Think back to
Let's not forget
Oh before I forget
Just so I don't forget
Before I forget to mention
Just a quick reminder
Quick heads-up
Don't forget
Always remember
Never forget
Let's remember
If you remember
You might remember
I remember that
Oh yeah, I remember
That reminds me
Speaking of which
Now that you mention it
Now that you bring it up
I'm reminded of
I'm brought back to
This brings to mind
This happens to be
Turns out this is
One thing I'd like to point out
One thing I'd like to highlight
What's remarkable
What's interesting
What's notable
Forget about
Never mind
Scratch that
I'll remember that
Got it
I'll keep that in mind
Besides what we talked about
Just a side note
While we're at it
Just so you know
Do you remember
Remember?
All the more reason
The exact reason
Until recently
Up until now
Not too long ago
Recent signs tell
Lately it seems
To look back on
To think about
In that respect
In that sense
A neutral view
This reminds us
With all due respect
No offense, but
Not to be rude, but
In this way
Like this
This way
As a rough estimate
Give or take
Roughly
Hardly ever
Almost never
Once in a blue moon
Seldom
Barely
Nearly
Just about
Close to
To a great extent
Big time
For the most part
In a big way
Excessively
Way too much
Over the top
In short supply
Hard to come by
Running low
An estimated
Somewhere around
Based on a calculation
After crunching the numbers
Doing the math
To what extent
How much
How far
To what point
How much do we need to
To this degree
To this level
This much
This far
Not as much
Not really as much
Slightly
Just a tad
A bit
A little
A lot of
Tons of
Loads of
A bunch of
The degree to which
To what level
In a way
Sort of
Kind of
In a sense
It's fair to assume
It's safe to say
It's a good bet
An interesting side note
Fun fact
Largely
This is largely
This pretty much
My last point
One more thing
Mostly because of
Largely because of
To deal with
To tackle
To sort out
To handle
If it occurs
If it happens
If it comes up
If it goes down
It's quite obvious
It's a no-brainer
It's pretty clear
It's clear as day
I somewhat agree
I kind of agree
I'm not on board with
Simply
Let me show you why it matters
Here's why it counts
Let me break it down
If you look at it logically
If you think about it
In many ways
In a lot of ways
Here're some ways
Here's how
Here're a few ways
Partially
Partly
In part
In some ways
More or less
Pretty much
Kinda
Somewhat
Halfway
A little bit
Except for
Barring
Aside from
Unless
Except if
As much as
So far as
To the point that
To the extent that
As far as
Up to
To a certain extent
Regardless
No matter what
Even so
Still
Even then
Regardless of this
Even with that
Despite this
Be that as it may
That said
While that may be the case
Granted
No matter
Even with everything
If not
Or else
In either case
Whatever happens
In the event that
Should it occur
If that's true
If it is
If so
If that's the case
Assuming that's the case
Even if
Even though
In that case
If that happens
Should that happen
In that situation
If it comes to that
While that's the case
If
In case
As long as
Provided
Assuming
Only when
Just when
Given
In this situation
Given the circumstances
If that's actually the case
If this checks out
If something were to
If it were to
At least
If nothing else
Worst case
Minimum
At a minimum
At worst
If worst comes to worst
In the best case
Ideally
If all goes well
At best
On a good day
Even in the best case
In an ideal world
In a perfect world
If things go perfectly
Either way
Come what may
Whatever the case
In any event
In any case
As far as I know
From what I know
For all I know
For all I care
I'm not an expert on this
Not my area
In some cases
In such cases
In situations like these
In times like these
In some instances
All things equal
If nothing else changes
Perhaps more importantly
What's more
Part of the reason
Partly why
A big part
As a part of
I want to say that
Just saying
From here on
A good rule of thumb
This doesn't always apply
Doesn't always go
Not always true
There're exceptions to the rule
There's an unofficial rule
The unwritten rule
It's sort of known
As things are
As it stands
Although it's true
If this is really true
Another perspective suggests that
Another take is
Seen differently
History tells us
Just to be safe
To play it safe
According to this
From what this says
Not that
It's not like
Sorta
Regarding
Whichever comes first
Whatever happens first
Only if
Just if
In some way
In a manner of speaking
Up to a point
In all other cases
So long as
It looks like
Seems like
Appears to be
From what I've heard
To my knowledge
Hoping that
Fingers crossed
If I may say so
Presumably
Probably
I guess
Frankly
Fortunately for
Luckily for
Thankfully for
In the hope that
Hoping
Arguably
You could say
It's fair to say
Some might argue
Speaking for myself
For me
Personally
Just for me
I'm afraid
Unfortunately
I admit
I confess
Rightly
Rightly or wrongly
On second thought
Thinking about it
Foolishly
Silly me
Oops
In a not-so-smart move
Truth be told
I suppose
To be honest
Honestly
Sadly