Castle of the Winds is basically a Roguelike, though, with a slight bit of story and an oddly alluring simple stat system. Which basically means you should probably find Dzz's port of Nethack relatively appealing - indeed, you could probably nick the tileset from Castle of the Winds and insert it if you really wanted to without too much hassle.
You'd miss out on some spell animations, and the houses in town wouldn't look quite right, and of course, no Surtre at level 100, but otherwise...