Why do you need to choose a label? How about just considering yourself an independent, and voting on each issue and each candidate on the merits?
For myself, I don't think libertarianism works. It seems to be based on a romanticized idea about people that does not correspond to the way people really behave.
As an independent, I can recognize that health care is broken and we need to consider a governmental system for that. At the same time, I can recognize that going the whole hog into socialism (state ownership of all industry) would be very damaging to the most creative economic forces.
Oh, and as an independent I can recognize that today's Republican party is under the control of extremists, and thus is not currently worthy of my vote.