Even when it's solicited, I think it's weird. I don't tell people what I do for a living when I introduce myself. And when they ask, I tell them I'm an exotic dancer. It's a silly joke (since I'm a fat 50 year old) that tends to break the ice and lighten up the conversation. In general, I think small-talking about what you do for a living is not really interesting to people, and just allows them to silently put you somewhere on their mental totem pole of importance. Better to talk about actual interests.