I got to thinking about it, because I've never done that. Okay, so I'm a registered Republican, living in a heavily Democrat state, and I like to vote Libertarian when possible. I know I'm not ordinary. But, even if I didn't want to vote for Libertarian candidates: there are often not Republican candidates for all the offices, so voting the Republican ticket would mean not voting at all in a bunch of races.
So, the mulling around turned into a poll:
Vote a straight party ticket
Vote for candidates individually, always choosing my party when possible
Vote for candidates individually, regardless of party affiliation
Always answer these things in the comments