Neutral overall. IMO, the party has both good and bad.
Good: Most of their official social positions seem to be fairly socially liberal. Pro-choice, pro gay rights, and supportive of open immigration policies. I like that they generally reject the religious right. Plus, I thought Penn and Teller: B**llsh**t! was pretty damn funny.
Bad: A sizable portion of the party appears to be Republican/Tea Party expats who are trying to appear "independent" by giving themselves this label (Wayne Allyn Root is a good example), which has sort of tainted the label. The party also has a large fringe component including rabid anti-tax activists, anti-immigration activists, and global warming deniers, plus a few paleocon fundies who joined mainly for economic reasons.
Overall, while there are a lot of perfectly sane people in the party, there are a lot of crazy people as well.
Because support for economic policies that would literally kill hundreds of thousands of people and lower the living standards of basically everyone except is just fine if the party in question is okay with gay marriage and doesn't want to restrict abortion rights.
Kill hundreds of thousands of people?
No, you must be thinking of tyrannical government, not the Libertarians.
No, I'm thinking of the obvious repercussions of total deregulation of industry, mass privatization of the commons, the end of child labor laws, minimum wage, overtime and other worker protection laws, legal heroin for sale at 7/11s, you know, all the things that the Libertarian Party platform calls for.