I’m voting Libertarian.
Would certainly prefer Bush over Kerry. Not many other Republicans or Democrats of national prominence whom I would consider voting for.
As an aside, I’m a bit perplexed by your choice of McCain as a plausible Republican. As a libertarian voter, I would assume you are in favor of limited government. McCain is about as far from being in favor of limited government as anyone in elected office. He supports infringements on the First Amendment (campaign finance reform) and the Second Amendment (gun control), higher taxes, government regulation of tobacco, stricter government regulations of broadcasters, and increased fines for “indecency” to name a few. The man is as far from being a libertarian as Teddy Kennedy.