oh, and also a drunk
Robert Downey, Jr. is your man. Why you would even look at someone else if you can cast him, I do not understand. Looking at his personal history, and his work, there is no one more suitable.
I'm glad to hear he's sober these days, and I hope he can stay that way, because the dude can perform. So I'm looking forward to Iron Man this weekend.
Oh yeah, and Sam Jackson making a cameo as Nick-Fury-Re-Envisioned-As-Sam-Jackson from the Ultimate books. (Is there a SHIELD helicarrier named Shaft? There should be.)