Y'know, I never really know where to get started with this one either. :-> I usually define myself in some way related to the person who's asking - I'm a filker, or from Chicago, or I do tech support, or I spin, or I'm an A&S geek, or a singer. But I never know what they'd want to know -a nd I know plenty of things that do define me rather well that I'm sure most casual acquaintances would NOT want to know. I'm dissociative, sometimes to a nonfunctioning degree. I'm repressed, have a bad relationship with my parents, and no idea how to handle most social situations. I have sometimes violent swings of mood, and binge and purge on hobbies. I'm terrified most of the time. But you see, they don't want to know any of that, even if it's what I'm thinking about at the time. :-> So I usually talk around the subject, find things that we have in common, and talk about THEM till we shift onto other subjects, naturally working around the question.