Thanks, I had to laugh when I read it too! I needed that laugh today
I am Pooh sized, although I am sure I have been call POO in other not so nice terms a few times too!
But I am sure you will get many answers, I can tell you that I have ridden on all nonthrill rides at the 4 Disney parks many, many times. For a reference point I wear 3x-4x tops, carry most of my girth in my lower belly/hips/buttocks.
I don't do Astro Orbiter any more simply because of back issues and leg weakness, its too hard to get out of the orbiters although I do fit. Poohs Honey pots are a little awkward to get in and out of due to the small door but its so much fun that I always ride it. I have ridden Space Mountain but that was in my younger (although larger) years. I don't do the Speedway simply because its BORING!
At AK - (again, only non thrill rides) I can't think of anything that I have not done, I will say that Primeval Whirl for a Pooh sized person can be BRUTAL, as in even with the restraint system that it has I get slammed around and left with bruises, I can only imagine what a skinny person looks like after riding it!
EPCOT - Nothing I won't do except Test Track and Misson space.
DHS - Again, nothing I don't do as long as its not a thrill ride.
I am sure thrill ride lovers will chime in and tell you their experiences with those.
Disney is a very accomodating park for people of size. Allears.net has a section that is about Disney parks (maybe the "darkside" - Universal too, not sure) and being of a larger size, its very informative.