Who would you have voted for instead?
Same person I'll probably end up voting for if Paul doesn't get the nomination. Gary Johnson, and I don't even consider him a very good libertarian (FairTax is not a good solution to tax issues, and he has waffled on Gitmo too many times). A lot of people voting for Paul are libertarians who know Paul is ideologically pure for the most part and are able to look over some issues they may disagree. Rand seems to be playing realpolitik and has no libertarian ideology governing his votes (though he often votes in a way I agree with on many issues). Where I really struggle with Rand is his "corporations are people" attitude and how often he seems to be kissing corporate interests. We all like Ron because he isn't being a corporatist, he wants corporations to duke it out in the free market and the government isn't there to protect them. Rand reacted very strongly in a pro-BP manner after the oil spill that seemed to suggest he wouldn't hold Ron's view that he didn't think BP should be liable for the damages they caused under a free market environmentalist tort system.
Gary Johnson gives me reservations, but he's better than Bob Barr, and if Ron isn't on the ballot I have no doubt I'll support him. If Rand had run along with Gary I would have voted for Gary because he is much more ideologically driven by libertarianism and doesn't try to sound like a neocon on foreign policy.