Having seen him recently in the films Blood Diamond and The Departed, I'll confess, I've grown a little weak-kneed about the actor. Practically speaking, I've been doing a lot of daydreaming about his characters wondering which Leo had better style. (What am I 16? Possibly...)

Mercenary Danny Archer
or

Undercover informant Billy Costigan
Danny Archer definitely has better hair. I also like the extra weight Leo put on for the role. But one also must take into account that Billy Costigan had better clothes and a preferable accent. (I can't believe I'm fawning over a Boston drawl!)
Are there other opinions out there? Or if you haven't seen either of these films, write and tell us about your favorite Leo style. (Titanic, anyone?)