DoomRL and Dredmor are pretty freaking great. Brogue is decent too. Angband, hmm.... my problem with the "big 4" of roguelikes (Hack, Crawl, and so on) is that they actually go completely overboard with the randomness, and not at all in a good way. I actually dont care for them myself. Havent played this "stone soup" version of Crawl myself though, that may be different. Dredmor though is the best one to start with. DoomRL uses great mechanics but it does become very difficult. Offers alot of difficulty settings though, and stuff like that. Keep your speakers on if you play that one, the sound is actually important.
Dwarf Fortress is absolutely amazing, but.... Lol, make sure you understand what it means to learn THAT game. I sat through 50+ tutorial videos on Youtube to learn this one, and even then, that sure as heck aint gonna teach you everything, it just gets you started. But.... ahh, bloody amazing game indeed. So very good. And hilarious.
