I'm always friendly, but I'll admit, I really hate people watching me draw or paint. My least favorite experience was with a 12-year-old girl who made me reconsider my condemnation of violence against children. Watercolors apparently come really easy to her and she made it her life's duty - for a full half hour! - to tell me how to mix my paints. There was also a guy who complemented me on the houses in my painting. There were no houses in the painting.
Aside from these two encounters, everyone who's ever come up to me has been overwhelmingly thoughtful and respectful. But it just takes me out of the zone completely when I know someone's watching. And I have to admit that the question "Are you painting?" is hilarious the first time and less hilarious the next 300 times.
Someone responded to the post with this quote which I decided I'd share. I think it sums me up better than any other quote I've ever heard.