I will happily vote for Ron Paul. Tom Tancredo could also earn my vote. Duncan Hunter rounds out the top three, for me.
Romney, Huckabee, or "Amnesty Sam" Brownback would only be possible for me if the Libertarians and Constitutionals do not join with the GOP to nominate Ron Paul, and instead choose one of their usual no-name quacks. (Often educated, well-spoken, sincere quacks, but still....)
Ron Paul is a kook...