I'm a registered Independent but I would consider myself somewhere between Republican and Libertarian and I will tell you what I don't like about both of those parties.

Republicans - Too tied to religion...its a free country leave that stuff to individuals, you can't legislate morality.

Libertarians - If you think the USA with its economy and military can just become invisible and not get involved in global events you're crazy. I mean it would be lovely to be isolationist but as Spiderman always said "With great power comes great responsibility"

As for the Democrats and more liberal parties....they are a waste of time, just a bunch of commies.