One of the main reasons I finally decided to support Mike Huckabee for President in 2008 is that I like the prospect of voting for somebody rather than against someone else. In 2004, I noted to anyone who would listen that John Kerry wouldn't beat Bush because it is too tough to rally people long-term in voting against somebody. The Democrats kept talking about how much they hated Bush, and they tried to turn out the vote with an anti-Bush message rather than a pro-Kerry one.
I feared that 2008 would be a mirror image. Only this time, it would be Republicans trying to GOTV with appeals to the scariness of Hillary Clinton (and make no mistake about it, she is plenty scary). This strategy is a loser. It's also why I never jumped on the electability bandwagon. In the Republican race so far, "electability" has most often been defined as "somebody who can beat Hillary." Yes, several people would be inspired to come out to vote against Hillary, but firming up that support is much easier if the Republican is someone the people want to vote for.
Mike Huckabee is the kind of candidate that many people will want to vote for, even if they don't agree with him on every issue. I've only voted "against" somebody once in my life. That was in 1996. I wasn't particularly thrilled with Bob Dole, but I knew he was preferable to Bill Clinton.
I'm excited to have a candidate I can vote for in 2008.