Every single Firefly character, mainly because I couldn't tell them apart.
The main guy, Mal Whatever, is apparently considered one of the "greatest anti-heroes ever." Then I suppose that must count for the rest of the Serenity crew:
You've got Mal; he's a badass.
You've got the rest:
The snarky, untrusting badass, the female badass and the rest; also badasses. Except that one really annoying chick, who kind of switched between annoying and badass on occation.
And then there's Serenity. Now we've got:
That one villain: The no-name guy... who is also a badass, apparently.
And River. The badass with an emotional complex. Revolutionary.
I don't know if I'm a minority on this, or if I simply didn't "get" the characters; I just didn't care about them. Maybe I don't understand the series as a whole. I just couldn't get into it, or Joss Whedon's work in general. There's just something about his writing that doesn't "pull me in."