He was folksy. Even with the "ums" and the "aws" that I wouldn't have expected from a professional actor, he is soothing and avuncular. Its a sort of non-threatening friendly style. That said, he didn't say anything that excited me and I'm always ready to be excited by a Republican leader. Reagan did the soothing, friendly style and still got a conservative wound up and ready to go . . .
Ums and aws don't cover it. Fred was clearing his throat constantly, which was annoying enough.
IIRC even Ann Coulter said she liked Romney - that is a heck of a conservative endorsement!