My thoughts on some of the candidates...

GOP
Huckabee seemed to be the best of the group. Rudy wasn't bad but his agenda is too liberal for a lot of republicans, as mentioned in the above post. Ron Paul basically acted like a nutcase and Mitt came across as being the bully of the bunch. I was tuned into the Facebook US Politics app while the debate was on and in general folks there seem to think Mitt lost a lot of support tonight. I agree.

DEMS
I think Hillary may have both won and turned off people at the same time. Obama was probably the best of the bunch, but not by much. Edwards seemed a bit far out to me. I think he may lose votes this time around but then again Hillary's whining and egotistical comments may cause people to vote for Edwards just because they don't like either Hillary or Obama.