I really liked this game.  I played pen & pencil Dungeons & Dragons for years, so I have an appreciation of the dungeon-master concept behind this game.  Dungeon Keeper 2 is a blend of real-time strategy, base-building, and sim-developing, but the real treat is being able to play as naughty as you want--and be rewarded for it!  There are a few things that I would change about DK2, but overall, I found it quite enjoyable, even years after its initial release.