RMS is pretty famous for responding to pretty much any query, for better or worse. There's a treasure trove of fantastic email responses to questions like "do you watch anime?" and "what do you think of my birthday card?"

I've seen a number of people rag on him, espousing that he's got nothing else to do (they may well be right) but it makes me respect the guy even more to know that he's replying to emails, even when they're dumb, instead of watching TV or browsing Twitter. He's a real consummate professional, even when the people around him aren't.