Someone asked a few days back what the favorite off-site restaurants are (mine was Sam Seltzers, they make a very nice steak dinner for small $$)
For onsite, I'm a HUGE fan of Trails End. If I'm in the MK, I prefer getting a boat to Fort Wilderness for lunch - as opposed to eating in the MK. (not during the +5.00 buffet charge time, though). If I was going to spend a little more, I like Teppan Edo.
Trails End has always been consistent and affordable.
For counter service - my favorite is DisneyQuest (Cheesecake Factory Express). Most of my favorite counter service restaurants are at Downtown Disney.
My favorite snack at a counter service restaurant - cous cous at the Tangerine Cafe. I also like the Spoodles pizza window.
I've been told I have "pedestrian" tastes. I don't go fancy too often, the only meal that has really bowled me over the last few years has been at Harvey's Bistro (off property, Lake Mary). Very different! I'd like to try Fresh at the Dolphin sometime.