6. Barry Kripke (John Ross Bowie)
"Kids wove me. There's just something about me that makes them waugh and waugh" Do I even really need to explain? That bad boy attitude, his complete lack of self-awareness, those robot fighting skills, the way he is with the ladies... is it any wonder Kripke makes the top ten? Kripke is one of Sheldon's many adversaries at the university in which he works and is yet another character who doesn't pander to Sheldon's overbearing, condescending behaviour. Other characters' reaction to Sheldon is a great source of comedy for the show. Kripke and his rivalry with Sheldon is a main focus point in several episodes - The Killer Robot Instability and The Cooper/Kripke Inversion being two fine examples. Truth be told, if this was a 'ten sexiest characters list', he'd definitely be closer to the top. And don't even get me started on that lisp.