Some of those things are obvious. For example, you give up a lot of your own time, and you spend a lot of your own money, to do the work. You have to give up some personal space, engaging with people you might avoid if engaging with them wasn't your job.
One of those things is less obvious, and people not recognizing that thing is probably a source of personal angst for current chair Nick Sarwark. Thing is, he can't really come right out and say it, because doing so is part of the package of things given up that he accepted when he became chair. So I'm going to say it. Not for him, because he hasn't asked me to or hinted that I should, and because he may not even want me to. But I still think it's important to. So:
When you become chair of the Libertarian National Committee, you give up a large part of your ability to speak solely for yourself. Your obligation is to be speak, and you will almost always be assumed to be speaking, for the PARTY.
So, there's been a little bit of controversy over Sarwark's recent interview on the Lions of Liberty Podcast: