I used to play Dwarf Fortress back before the Z axis was added and I recently got back into it after getting my first Angband victory. I got to tell you, it is the most addicting game I have ever played. Once you get over the sort of steep learning curve, it is serious fun.
My only real complaint with the game is that the code can bring your frame rate to a crawl once you get a large population.
Any other players out there? Can I get a sweet 3x3 embark off of you?