Honestly, I don't think there was a "winner". Debate was basically a cross between The View and Maury Povich.
Who was the smoothest, best prepared, most practiced? Carly Fiorina... because she is a master saleswoman who has spent her entire life hawking a single product... herself... and she's damned good at it.
Who looked the silliest, while trying not to? Trump. He tried to behave, honest, but like Popeye, he yam what he yam.
Who looked the most frighteningly insane? It's a draw between Huckabee and Cruz. The thought of either of 'em in the WH scares me so much I have to change underwear.
Who looked the most naive and out of place? Carson, bless his heart. Nicest guy on the planet, perhaps, but it became crystal clear that he doesn't have a clue what a president really does, and must do.
Who stepped up a notch? Christie, actually; he made his points well, and probably will be reflected with a bump in the polls. Rubio didn't hurt himself; didn't help himself much either, though. Kasich said the right things for the most part, but I kept feeling that underneath the rational, moderate words raged a frightening extremist heart ala Huckabee/Cruz, he just covered it better; still, I liked him and he bears watching despite my suspicion. Ron Paul, because I found myself nodding and agreeing with him on occasion. Jeb Bush did a much better job in this debate, but still looked stiff and uncomfortable; over all, he did pretty well.
So far, I can't really get excited about anyone yet.