I would say hard work and determination for a non-political, personal trait
I would say anti-vaccine would be a social issue that many take to yet it’s not an actual libertarian position (real libertarian position would be that people are free to take or to not take a vaccine). There are also lots of pro-vaccine/pro-science libertarians like me but we seem to shout the quietest.
Throw communists out of helicopters is also another position that some libertarians have that is actually anti-libertarianism
Many libertarians also can’t utilize nuance although many can, and this is a problem with most humans so don’t want to leave this as a libertarian thing really.
Many libertarians use logic when coming to conclusions despite some libertarians lacking a deep sense of nuance, so that’s one more positive (if you consider using logic over emotions as a positive which I do, I think emotions are important but can lead to more trouble than when we drive our actions with rationality instead of pure emotions.)
I think libertarians are also more of autodidacts (self-learners) which isn’t specifically a libertarian position, but it is something that most libertarians seem to do, and do better than most. The average human is not nearly as deep into learning as most libertarians I know (so another positive)