Guys. I feel like girls never ask serious questions, serious as in something that challenges your mind, makes you think, deals with world issues... it's usually personal stuff or about dating, so it's not really interesting. I've noticed that girls tend to avoid answering serious questions, too.
Girls are more honest. They ask sincere questions regarding their own insecurity and feelings. This includes sex relationships and actually appearance. Guys on the other hand talk about their penis how great they are and boast. Girls win by a landslide
Guys lol girls are stupid questions haha they ask should i shave down there like a million fucking times, and really specific questions "does he like me/how to approach the shy guy/do you think he wants to get back together" that require mind reading
I've seen great questions from both genders, though guys tend to ask a wider range of questions. I know it's a love and sex - type of site, but that's generally almost all the females talk about with little variation. Guys more often mix it up with questions about social politics.