Actually, the way I'm that way may because I've DM'd far more than I've played, and even when playing I sort of have one mental 'foot in the door' on the other side of the screen.Oh, that's interesting. I've never felt anything remotely like that after playing a character in D&D — only after I DM.
Maybe that's part of why I enjoy being a forever!DM and kind of dislike just playing.