I can only speak of personal experience (and having spent time with RMS twice in total, several years apart that's not a lot).
My experience of him was that publicly he wants people to value free software, but it's a means to an end. I don't actually have a problem with about 60% of what he has to say on the matter. Open source software fuels innovation and as long as people can still fund further innovation I'm happy with that. However, what I object to is the idea that only FSF-papal-blessed software constitutes free software. If I want to release my software under a BSD licence, it's not free software because RMS doesn't think it is. That's my problem with him, at least professionally speaking. On a personal note I don't think we'd get along - primarily because (and credit to him) that entire argument is pretty much his life (as far as anyone can say from meeting him twice).
Now I could be completely wrong about all of this, and maybe RMS is a pragmatic standup guy and I just got the wrong impression, but even Theo De Raadt had a sense of humour.