Just as a side note, I've been flashing custom ROMs for 4 years, so I'm not a newbie anymore. I've always been with Samsung devices (because they're cool ), and my first one was the SGS. Now I'm on the SGS3 (d2att : Bell) for a year at least.
Now, the problem : I was using the new AOSB Project ROM and I wasn't happy with the battery life, so I wanted to switch, but now any ROM I try to flash stay stuck on "Formatting System partition" (or the logo for Resurection Remix).
My first idea was to manually format that partition, but the ROM always want to format it so I got stuck again (without any backup rom to go back to). So I used Odin to restore to a stock 4.3 (was 4.4.2), re-rooted using Unifed Android Toolkit, flashed PhilZ Touch Recovery (was with TWRP 18.104.22.168) and it was working. But I don't like TouchWiz so I tried again to flash. So I used Odin again because I was still stuck on "Formatting System Partition" and did the same mistake.
Now, my phone is sitting beside me for an hour, trying to format that partition because the stock 4.3 stuck on the Samsung logo...
I'm all out of ideas now...
As I'm not a native English speaker/writer, feel free to ask for precisions or if I forgot something!
Hope I don't have to go buy a new one!
Thanks in advance!