Heath Ledger or Joaquin Phoenix?

Heath. Both excellent performances. Heath puts it over the edge (for me) because there is no evidence of the human being known as Heath Ledger when his Joker's on screen. Not his physique, his voice, nothing.

I also prefer his ragged, darker purple suited look, his green hair is darker and messier, and fascinating though Joaquin's backstory is, I like that Heath Ledger's Joker wanders in a fully matured wild card of chaos.