^^^Also, I hate when you've talked to someone only a few times and they ask "Are you a virgin?" To the people that say that, geez, I don't know you that well, I'm not going to share my personal sexual life!
Sometimes I don't like when people try to grab away your phone ask "Who are you texting?" That can be a little personal too.
I could probably think of so many more, but that's all I've got at the moment.