Dungeon Crawl Stone Soup

The new doom system is kind of cool. When I got doomed with claustrophobia, I had to switch up my play style quite a bit for 1½ dungeon floors. Which is long enough that it's worth developing your character somewhat differently to help deal with that.

Obviously, you still want to avoid being doomed, and it isn't too hard to do that so far, at least in the dungeon, but as a form of punishment, it is quite interesting.
Might be worth throwing out the draining system and giving those monsters doom instead, as draining was never too interesting...