Despite not really being a fan of platformers or console style adventure games Psychonauts really grabbed me with the writing and level design.
Evil Genius was fun if you're into that style of game, unfortunately I never played Dungeon Keeper so I can't compare it to that. But I am a fan of games like The Movies, Gangsters, and The Sims to a degree. Build a lair with minions and traps etc.
Psychonauts is definetly worth a revisit but I'm not sure how well Evil Genius has held up over the years.