AIBU to think this is a bit of a personal question and it's rude to ask?
"Where do you work?"
"What do you do?"
"What profession are you in?"
Etc.
I find it really invasive and wish people wouldn't ask! My situation is not straight forward so it takes a bit of explanation, and giving any level of information to a stranger who has just asked makes me feel uncomfortable.
Why is it anyone's buisness? I feel like they want to know where I "fit" - as in, am I skilled, roughly what that role would earn, what type of person am I; be honest, people judge you differently based on your job. You can be stereotyped so easily too.
Now I just reply "Oh, I do this and that."