I’m no libertarian by any stretch of the imagination, but there’s zero chance I’m going to vote for either Clinton or Trump. A vote for either of them is a vote for the NSA, and (aside from global warming) there is no current bigger threat to democracy itself than the utter destruction of privacy. (And to think, people used to be upset about the idea of the government looking at their library history.)
On the other hand, a vote for Gary Johnson is simply a vote for Gary Johnson. I may not like all his stands, but there isn’t a single viable candidate who will protect basic liberty like he will.