I am a big fan of Ron Paul, and I do like Rand, but he does come off as more of a politician than his dad ever did, which kinda bugs me. I do like his positions on most things and I do believe he's an honest man - I just wish he'd work on his delivery.
Ben Carson is very smart and I really like him. He is very well spoken and carries himself with dignity / grace, which unfortunately can easily be misconstrued as weakness in politics. I wish we'd been able to hear more from him. His closing statement was great, as was his brief explanation of his tax plan (which gratefully only requires brief explanation, rather than 15,000 pages of code).
Trump being Trump. I do like his guts & moxie but I don't think I trust him, and that's a big deal.
We don't need another Bush (Hillary would cream him, IMO), don't like Christie at all. Rubio is OK, has some good positions but I just don't like HIM, if that makes sense. I really like Cruz. Huckabee gave some good answers but I don't trust him at all. Wish Fiorina would have been in the 2nd debate because I'd like to hear more from her.