I have very fond memories of Dungeon Keeper. The devious traps, the torture chambers where you could convert your goodly hero prisoners, the way you could backslap your imps into working a bit faster, the way you could take possession of any minion to turn the game into an FPS... all of these, plus many more, were just genius-level design elements that made the game what it is.
The 90s were a special time when it came to video games. I'm a bit saddened that we are unlikely to repeat that era. There are some great games today too, but none of them capture that same zeitgeist.