To me it's stories like "Joker's Favor", which showcase the utter malevolence of the Joker better than the comics have in years. He doesn't kill someone who annoys him, that would be easy. Instead he tells the guy he owes him a favour and leaves it at that, but in the process ruins the guys life. Turning an ordinary, innocent guy into a casual hobby, even after the guy has changed his name and moved to a new city. The payback scene in that story is also magnificent. As I've probably said before, the Joker knows that killing is easy, destroying someone and leaving them alive at the end of it is much more cruel.

Another story in the issue this Scarecrow tale came from has a night of the Joker wandering the streets of Gotham after a failed robbery spreading casual mayhem in his wake. The only part I didn't like was him getting donuts and giving the terrified clerk fake money impregnated with Joker venom killing him outfight.

As the clerk had actually been helpful, I'd have preferrred the Joker saying something like "Bob, you were terrific serving me tonight, and I want you to know that anytime I'm in the area I'll pop in for more donuts and if you're NOT the one to serve me, well, I won't be a happy customer. And after I've made my displeasure clear, I'll come looking for you to find out WHY you weren't there for your favourite customer" and let the poor guy live in fear for the rest of his life.