How about supervillains? Captain Mal Reynolds? Doogie Howser? Sarcasm? Laundry?
Okay, if you love all of them, then you already know what I'm gonna say next. If not, hie thee IMMEDIATELY to Dr. Horrible's Sing-Along Blog and languish in the marvelosity that springs fully formed from the mind of Joss Whedon. If you go and watch this and say anything - ANYTHING - derogatory in the comments, then you are dead to me. DEAD, I say, because this is the very pinnacle of webertainment, as far as I am concerned.
If that is not enough to convince you, might I just say that Nathan Fillion's shirt is decidedly nippletastic? I thought so.