So for myself, my favorite system in many categories in WOiN RPG.

It's a d6 quantitative pool system with lifepaths for advancement, which are like classes but you're meant to take sprinkles of different ones all together, they represent what you've done with your life, and starting characters have 5 'levels'.

It has rulebooks for three default genres, medium low fantasy, 80s action movies, and somewhere between star trek and babylon 5 science fiction.

It's reasonably tactical combat, medium crunch, and pretty cool systems for a lot of play.

It also has a verb+noun default magic system and a spellpoint system as an optional rule for additional crunch.

It's coming out with a new starter set later this month on kickstarter with a condensed version of the rules, a bunch of pregen characters, and three prebuilt adventures.

I've also played a bunch of other games, mostly fantasy d20 in nature. ATM PF2e is my favorite fantasy d20 game.

I've started reading Ars Magica 5th edition recently, and it's also super interesting to me. It's pretty unique among the games I've looked at for making the players' home base be central to the story and mechanics outside of just being reasonably safe for the players to crash in.