I answer questions on Quora every day. The thing with the site is its not only a factual Q&A site. There are many queries about did you ever experience or what do you think of type questions. There are lot of asking . at least to me, depressing, disturbing topics. Like these really give me the creeps. However overall I do use it and I find it useful. I'm on Reddit too. I go on there every day too. I enjoy commenting on various subreddits too.