While I find some thick women attractive, I would never date them. I work out 2 to 3 hours a day and try to eat right in order to be healthy and attractive, and expect some amount of effort from women to do the same. Not to mention fat girls seem to have the worst attitudes, attributing others successes to "luck."
I went out with a thick girl many years ago that had a gorgeous face. She was a vegetarian and rode at least 10 miles a day on her bike. I couldn't understand how she was so thick (5'9", 150lbs or so.) She was also great in bed (mind blowing head and got so wet that she left spots.) I ended up breaking it off because I didn't want to take her around my friends. Like a year later she drops all the weight and looks like a supermodel. She quickly gets engaged and married. /facepalm