I wouldn't call the Joker exactly easy to write.
I think you have to be crazy not to want to work on the Joker! I can't think of many characters, heroes or villains, that are as malleable as him. He really can be interpreted in so many different ways, and generally, people don't really want to scratch the surface because you can get into some really dark territory real fast.
When I was younger, I used to love Tim Burton's 'Batman.' I was, like, 15, and even then, I was aware, 'This is really the Joker's film.' It's like, the Joker just takes over, and Batman, you really don't learn too much about him.
Denny O'Neil did some great things with Joker - I thought Greg Rucka used him really well in 'Gotham Central.'
There was never a moment where I was intentionally cribbing from another actor. More so, I grew up watching other actors design the character of The Joker to me, and obviously, the part was paying tribute to The Joker, and so I wanted to, you know, perform it to the best of my abilities in a way that it seemed to be paying homage to the character.
The Joker that Christopher Nolan created in 'The Dark Knight' had the scar across his mouth, and the first time you heard his explanation for it, he makes you believe that's how he got it. But then you get into the film, and every time he talks about his scar, it's a totally different story.
My dream role is to play in a story of how the Joker became the Joker, and I would play the young Heath Ledger.
Joker' is, of course, a character of my generation grew up with, and it's a character you know really well and have strong opinions about. He's been a larger-than-life character in fiction. He's one of these rare characters that have had such strong performances.
In truth, I've never been a big superhero fan. I don't mind some of the movies, and a couple of the cartoons were alright - that Batman series from the early nineties where Mark Hamill voiced the Joker is sweetness. But largely, I've not really had much time for superheroes.