Well, Disney is pretty much one big FUN experience for me so that would qualify EVERY restaurant but some of the highlights from my October honeymoon would be:
1) The character breakfast at Chef Mickey's. This is a buffet type of meal but everything was very fresh. The characters come around to each table to interact with you. Since we were wearing our "ears" we got lots of extra attention. There is a part where they play a song and everyone in the restaurant is supposed to hold up their cloth napkins and twirl them around in the air. The characters parade around the place with the young ones -- of course my new hubby and I joined them. We had sooooo much fun!
2) The Luau at the Polynesian. So much wonderful food. Chicken, ribs, the best pineapple ever! As much as we cared to eat. They do seat you with other people, long tables for about 15 I think. We loved getting to know our other tablemates and they were all so sweet to us. The show was fun and there was a point where they invited all honeymooners and anniversary people to come out on the dance floor to dance to the traditional Hawaiian love song. They had a photographer there and it's one of my favorite trip photos.
3) Flying Fish at the boardwalk. Mmmmmmm! I just enjoyed the atmosphere here. "Lively" (and close to where you will be).
4) Boatwright's at Port Orleans resort. This was my husband's favorite. Nothing too unusual about the food choices but the wait staff really went out of their way to show their "southern hospitality". Also, you can rent a carriage for two to show you around this resort for about $40 for 30 minutes I think. One of our favorite experiences to take it slow and enjoy the beautiful scenery of this resort.
One place we didn't get to try but I've heard you get "picked on" is the Roaring Forks in the Wilderness Lodge resort.
For the first day I "made" my husband wear his groom ears and after that it was easy to convince him it's a good idea! We would get "front of the line" priviledges, "hot seats" at Who wants to be a Millionaire, free desserts, lots of acknowledgement, it was great.
I don't know about getting room upgrades, doesn't hurt for them to at least know about your special day. We did get chocoates left in our room so that was a nice surprise.
Brenda