On the topic of Barthandelus: Awesome boss, lame villain. I don't know. A good villain is also great of course, but I'm just a sucker for big epic boss fights like that. I think my favorite boss of all time is the final boss of Mass Effect 2. The way it's just chilling in the background unfinished but then oh trout it's just finished enough to get IN YOUR FACE AND SHOOT LASERS AT YOU OH GOD SHOOT IT IN THE EYE