Giuliani is my favorite Republican candidate. I support him because I feel he's the only candidate who has a strong chance of beating the Democrats. A lot of moderates and liberals find his stance on social issues attractive, and I think this is key.
He can also get the vote of a lot of the members of the younger generation who are fiscally conservative and socially moderate to liberal.
Republicans need to be focusing on not getting the most conservative or most stereotypically Republican candidate, but the candidate who has the best chance of securing a Republican win in 2008, and I believe that is Giuliani.