My top 5:
1. California Grill - I can't say one negative thing about the food, the service, the wine list, anything. We had the best meal of our lives there. (That was the night the famous sentence, "We'll have all the desserts" was uttered.

There were 4 of us, 5 desserts...we made it work.)
2. Le Cellier - Just good all around and you can't beat the beers.
3. Liberty Tree Tavern - I love comfort food and theirs was respectable. We also went when they still had the
MNSSHP character dinner and it was a really cool atmosphere, which will be different now without the characters.
4. Ohana - Fun atmosphere and good food - especially the sauce for the bread pudding.
5. This was quite a few years ago, but we really enjoyed our meal at the Teppanyaki Grill (now called Teppan Edo, I think?) Much better than any Benihana or equivalent back home.
As for counter service, I had one of the best sandwiches ever at the Sunshine Seasons food court in the Land at Epcot. My favorite CS breakfast spot is the bakery on Main Street in MK. Favorite snacks are the funnel cakes at Sleepy Hollow between Fantasy Land and Liberty Square (I think) at MK, and the Kaki Gori (sp?) snowcones at the Japan Pavilion at Epcot.
I've only been to two character meals, breakfast at Crystal Palace and dinner at Liberty Tree, which is no longer offered as a character meal. I have no complaints about Crystal Palace, the food was good and the 100 acre wood characters were very sweet and interactive.
To the person who asked about Boatwrights - we give it a "meh." It was okay for what it was, and convenient since we usually stay at POR, but the food was mediocre at best. However, if you're in a bind, they usually can seat you without ADRs.