Why Ron Paul over Gary Johnson?

[Cobbler]

Something I can't really understand is why libertarians I know tend to prefer Ron Paul over Gary Johnson. It seems to me that Gary Johnson is more of an actual libertarian while Ron Paul is more of a paleoconservative. He believes in individual liberties at all levels, while Paul just believes in them on a federal level (he more or less thinks states should be able to reduce our liberties however). Johnson also has executive experience running a state and won reelection twice, while Ron Paul has just been a Representative.

The reason that I could think that people would be supporting Paul over Johnson may be because of name recognition, but I think it could be argued that had Paul not gotten into the race, then the libertarian vote would have gone to Johnson and he'd have done better. Plus, Johnson was in to actually win, whereareas I get the impression that Paul is either in it to help his son's future career or because he has liked being the leader of a movement.

So why is it that libertarians prefer Paul to Johnson?