Recently I've started falling further into the dark abyss of roguelikes. It all started with Dungeons of Dredmor about a year ago.
Most roguelikes use ASCII graphics or similar which is very unappealing to most people. It was for me too, until I found this game, Caves of Qud. I'm a sucker for character creation in RPGs and this game just hits the sweet spot. You can choose between a true human (more skillpoints, better starting items) or a mutant human. Mutants can choose between plenty of mutations, like having a couple of extra arms (which can totally be equipped with weapons), two heads, shootable quills, or you can go down the line of mental mutations which works like a "magic" system.
It's a pity roguelikes in general are such an eye-sore, it's a great genre to get into once you get past the ugly graphics.
Would love to hear about other great roguelikes out there.