We were at WDW for our 35th anniversary, and among other things, we enjoyed a wonderfully special anniversary meal at Artist Point. Because it was specifically booked as an anniversary dinner, the restaurant presented us with a signature berry cobbler dessert on the house. They also gave us a special window table as well.
The other fun thing we did was a "rehitching ceremony" at Garden Grill. It was a hoot, because they made us kiss to the count of 100, and then presented us with a special ice cream dessert.