[AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin] mindstormer:
I recently rooted/installed CleanROM for my S4, but now I have some basic questions regarding what actually happened in the process and how I could improve it. (First smartphone, first Android).

1. Is flashing the exact equivalent of installing a kernel/ROM/app in a recovery like TeamWin that is zipped in an SD card? All I did was select my zipped file and install--the guide says to use GooManager but I never used it. Also, does updating TWRP, kernel, or ROM (same application/kernel/ROM, but newer version) require that you delete the old ZIP, copy over the new ZIP, then install it? Is there a cleaner method (I feel that since we have to wipe to prevent old files from interfering with new ROM that maybe parts of the old version of a ROM may be redundant or may interfere with the new ROM?

2. Is there a way I can save the phone settings when dealing with one ROM and transferring these settings to another ROM? I really don't want to spend 20 minutes to go through all the settings and change it to my liking every time I install a new ROM.

3. With TWRP I could backup the entire ROM and also be able to install that backup ROM if I don't like the new ROM installed? What does Titanium Backup offer in regards to this aside from backing up app data and the ability freeze/uninstall system apps?

4. Does Titanium Backup leave any residual files? I see other apps designed to uninstall system apps and Titanium Backup seems like an all-in-one jack of all trades.

5. I thought I wiped everything and to me, that sounds like reformatting the entire drive. I only wiped system, boot, and data though (good enough for ROMs, according to what I've read). I was surprised when I saw my videos that I had already backed up to my PC accessible on the phone. Should I just wipe literally everything (I assume it would be cleaner) like cache, preload, EFS, modem, recovery, etc.? Will wiping literally everything be like reformatting my phone (since my phone was not reformatted because my personal videos was still there when I installed my custom ROM? If I were to install completely different ROMs cleanly and wanted to keep my personal files, I would only need to wipe system, data, and boot?

4. Do I have to use CASUAL again to install an updated TWRP?

5. Does backing up a ROM also backup its root? I'm going to assume this is a dumb question and the answer is no. I'm also guessing I have to block OTA updates from AT&T to ensure I keep my root. How would I go about doing this? Also, would my phone be "safe" if I stick to my ROM (no updates or anything) for 4+ years? I'm asking this as an extreme case because I feel like I'm missing out on AT&T security updates that could protect my phone and also I don't think the developer my ROM (CleanROM) will do frequent updates).

6. I had problems with my computer not being able to recognize my phone and my SD card in the phone after I wiped everything and before I installed a ROM. I literally had to take the SD card from the phone and use an SD card reader to transfer my custom ROM/loki then put it back into the phone. Was I missing a driver?

7. What are some must-have apps a newly rooted user would want?

8. I read that you only need 1 EFS backup and you don't need to back it up every time you are going to install a custom ROM. Can I get a confirmation?

9. What does Goo Manager do and would I want it?

10. Is it essential that I keep up to date with news about my custom ROM/phone to ensure my phone is secured?

**Not Root/ROM related--Is swiping an app away from the Recent Apps List (long-press home button) the equivalent of killing an app? I use the Recent Apps List often but I don't want to go about swiping apps away if means it is killing it, since I read that killing apps are bad and actually drains battery life. Also, is there a mod that lets you access the Recent Apps List by long-pressing the menu one? I only see a mod that kills the app if you long-press it.

Also, any ROMs you guys can recommend me that is like CleanROM? It has to be TW-based because I use multi-windows. Basically, I want a stable, popular (popular ones tend to be more frequently updated, which is important because there are often bugs in custom ROMs), and optimized/debloated ROM (as debloated as possible, I rather use my own large list of apps than pre-installed ones). I was looking at GoldenEye but I'm not sure.

Thanks. I'm hoping for many responses as I have more questions to ask but not a lot of free time (I will check back on this thread every several hours until there are no more responses on the thread.