>"You don't talk much do you?"
Why do people ask me this sometimes? Is this code for what's wrong with you?
It's a stupid question but kind of logical if you think about it, it's a simple ice breaker, one of the first things a person notices about you.
They probably just want to start a conversation anon, I know the question itself kind of contradicts that but people usually don't think that far.
they're just trying to be friendly and get you to open up a bit more
I'm a pretty quiet guy as well, I don't have many (any?) friends so I'm pretty awkward in social scenarios that sometimes crop up at work but I do open up a lot more one on one. It's something I've really got to work on.