The Pooh characters at Crystal Palace are fun--no rushing to eat, all characters come around, even a few times if you take longer to eat.
We have done Chef Mickeys and LTT--could go either way, not great, not good, not bad.
We did the Castle once, had a lot of characters, food was good.
They used to do a villian dinner at Grand Floridian which they discontinued--it was really fun, those villians do some good work with the crowd.
The breakfast with Donald at AK was alright--food wasn't that great, long lines to eat, some people missed the characters when they came around because they were waiting in line for food. That place is TOO small for the number of people they get.
I hope that rumor of Toy Story characters at MGM is true--we are going to be there the last week in May. My kids are 12 and 9 now--I don't think my daughter (who is 12) is too intereted in seeing Cinderella but she would love the Toy Story and Incredible characters--plus it would be a change of pace. We go to DW every 2-3 years and we keep doing the same meals--they are fun, but, like I said my kids are older, at some point we will stop paying the extra $$$ to go to them. I bet there is a big market out there for older kids to interact with different characters at meals.