I'd recommend Terrafirmacraft. It overhauls the entire game, and makes it a lot more difficult, and realistic.
I like it because of the various new systems, such as metal forgery.
tbh I thought TFC was okay for awhile but then it just got dull and monotonous; looking all over the world for a specific stone type out of a hundred and desperately hoping to find traces of a mineral somewhere
I suppose it's fun for other people otherwise it wouldn't be as popular as it is and I say go ahead and give it a go but to me the unrealistic aspects of the game are part of what make it fun
not to mention it's even worse at being "one of those wiki games" than minecraft already is, you need a manual as thick as a novel to get even a vague idea about what the hell you're supposed to be doing