[One (M7) General] puremind:
- Back button a bit fiddly

- No home button but actually if the back button to be reprogrammed so that 1 tab is menu and 2 taps means back, that would be even better.

- There should be an unlock function through volume buttons, for more accessibility, but now I actually use my thumb to reach to power button

- In general, buttons could protrude a little bit more and have better feedback, though you get used to it

- My 2 HTC One's have no cracks or overhangs, there is only a very thin hairline gap at the top which doesn't bother me

- I would like the ability to change color calibration

- The notification LED coming from the speaker grille is a bit awkward and small, I would have preferred a separate LED opening.

Other inconveniences that do not bother me personally:

The very faint sound pops don't annoy me, on the contrary, it makes it feel like a high end AV receiver (Arcam AVR600, my baby!) where you do get those, too (too much power) :)

Battery charging is 4hour20 min for me - this is more than my Galaxy S2 but still quite fast considering it has a higher capacity. Also since the last percent take more time (to protect the battery), even if you charge less than 4 hours you are still quite close to full charge, so still ok to take with you and have a full day of use.

MicroSD slot doesn't bother me, because I will get this small device here:

http://www.kckstarter.com/projects/andyfei/mini-microsd-reader-for-android-smartphones-and-ta

Removable battery is not an issue for me, because I change my phone every year and I actually don't like small internal batteries that require the cover to be opened. I prefer a larger capacity external battery that doesn't require me to open my device and that can charge from the same power cable as my phone simultaneously (power cable to external battery, which in turn charges the device, in a single chain).

Now having used the One for over 3 weeks, I can say that this is really a well rounded device. I held the S4 in my hands a couple of days ago. People can say what they want, the AMOLED screen has dirty turquoise whites EVEN in movie mode and it is really quite a bit dimmer, auto-tune does not change this. I tried browsing the same pages with both devices and the One really has the better screen. I didn't expect that because of the early film mode measurements I had seen, but I will have to measure that screen myself, as I don't believe it has proper RGB balance...at all.

Also, the design looks like an unfinished industrial prototype to me. it doesn't feel like a properly finished product.

I was going to give the S4 a try (I still have it ordered), but the screen experience is making me doubt whether I really want to do that. The only reason was going to be better battery life, but the One has made me happy in that area now, and the S4 seems inferior in terms of web browsing time and web browsing and whatsapp/facebook/texting is that's what I do most while on the go...

Now the camera update is really making another strong argument for the One. Really, try though I may to nitpick and find reasons to like another phone, I can't. The One is a phone you can fall in love with and then nothing else contents you.