Though I haven't read them, I definitely think Hush, Dark Victory, Long Halloween, Arkham Asylum, and Knightfall would be considered some of the best (and I'm hoping, lol, I don't want to be disappointed, despite knowing what happens in them). I have read The Killing Joke, though, and I absolutely loved it. So far out of all the ones I've read, TKJ takes the cake, but there are a lot of Batman comics out there that were really good. Emperor Joker was cool, too. I think overall Batman brings the best storylines to the table in comparison with any other character...Spider-Man has some good stuff, but would be behind Batman to me.