Giuliani's Speaking Style

Watching Giuliani on Larry King some time last week, I was struck by how unpolished and unscripted some of his answers seemed. Now, it may be that this speaking style was by design and he gave the answers exactly as he prepared them. But it also may be that he is taking an approach in which he does not try to script all his talking points perfectly. Some of his off-the-cuff remarks seemed to indicate this (such as a joke to the effect that he thought he had married only male/female couples as Mayor, but he couldn't verify this completely). Regardless of why he was speaking this way, I wonder how this style will play. It definitely has some appeal to me, as I'm tired of listening to the standard smooth talk of politicians. But even to me it seemed something less than Presidential. So, I could appreciate it, but I wasn't sure it was for me. How will mass audiences take to it?