There was another game I remember playing, I think it was called Moria, on the Amiga a while back. The plus point it had was that it was graphical when everything back then was ASCII.
I quite like the graphical version of Nethack as well, but nothing beats ASCII for the bewilderment it causes when friends come over and see you playing nethack or adom. I've always been playing things like this while they were raving about the latest games on their PC. Never have been much of a games player myself, but when I do I end up playing MAME or Speccy emulator games, not exactly state of the art....