I already unlocked my bootloader successfully, loaded TWRP 188.8.131.52, and rooted the phone, but I keep reading about S-OFF and Sunshine and Firewater and I'm like, WTF? Do I need to enabled S-OFF to flash a custom ROM/Kernel? If so, is there a free way to do this (I see Sunshine costs $25 bucks and I have no idea what it does or why I need it)?
I figured I'd ask before trying anything, but I don't want to get setup if I'm just going to flash over everything anyway.
Also, I'm quite a minimalist. I like Sense, but I'd like a ROM with some optimizations performance and battery saving wise but not so much a visual overhaul. The realistic usable additions are welcome, but I don't want a ROM that is completely themed and doesn't mesh well with the default Sense 6 style. Can anyone recommend a nice ROM to start out with?