@psnacks I'm a Thaumcraft boy personally because I like how it obfuscates things and makes you deal with garbage initially before you get better. Lots of mystery....
And yeah, expert mode limits you to stuff like IC2 and Immersive Engineering early on. It's fun to overcome the challenges tbh... my IC2 nuclear reactor, even in MOX mode was only making ~5000 RF/t, but now the Big Reactors setup makes over 500,000 RF/t... and I know from experience that Draconic reactors can get up well over 1.5 million, providing you know what you're doing.
(They're poorly documented, so that's another thing I had to write my own software for...)