I really enjoy the food at Port Orleans - Riverside Mill Court. They've got a variety from hamburgers to chicken fingers, as well as Mexican-themed dishes, Pasta, Pizza, subs and even a Philly Cheesesteak sandwich. For the healthier eater, there are salads and other dishes available.
The only downside to eating at this particular place is it's a bit out of the way from most parks. However, if you're coming from downtown disney, it's only a boat-ride away.
Animal Kingdom Lodge's Mara was also nice. It doesn't have quite as a selection as the above, but it's only a quick bus-ride from AK and I can gurantee the decorations are beyond amazing at this resort.
These are my choices. I've never been to the Roaring Fork CS at Wilderness Lodge, but if you have a chance to see the decorations there, they are tied as my favorite (a very large tree going all the way up to the ceiling through the large lobby), Grand Floridian is the other -- with it's life-size gingerbread houses that actually have gingerbread inside for sale.
Have a good time!