Hi Moe. I have always felt like Lisa, that obese is a medical term, and fat is just plain insulting. But I can't know this. I have not been either. I would tend to trust your judgment on this, since you write the Large & Lovely site.

At my heaviest times my mother called me "healthy looking", or "chunky." I didn't LIKE it, but it was true.
I do know that as i watch the contestants on Biggest Loser get smaller, that in my POV, they go from Morbidly Obese (not all of them start that way, but a few do), to just Obese/Fat, to Fat/Heavy, to Somewhat Overweight, to "Average Figured", to (in some cases) amazingly Thin. A rare few seem to also get Underweight, but I will assume it's just for the show and not for their lives.
Do my categories seem accurately perceived, or is Obese really a pejorative and I should adjust my thinking?