For the food...
O'Hana's is what comes to mind. Though there was excessive amounts of food, and were we not on the dining plan, it would have cost an excessive amount of money... The food was ALL delicious. I think I liked every single dish they brought out!
However, for atmosphere...
Whispering Canyon Cafe, is my favorite. Not to say the food there isn't good, just that it wasn't my favorite for that reason.
Oh, but there's so many! Dining is one of the best parts about going to Disney.
Other ones I really like are:
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50's Prime Time
FUN! I don't think it would as good to go to alone, but it was really great with all my family there together. Heh, all my siblings dumped their green beans on my dad's plate. xD Ironic, that I - being the only one who would have actually eaten my own green beans, and the one whom fries make sick - got french fries with my burger!
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Rainforest Cafe
The food is thoroughly average. BUT, the theming is really great. Oooh, the Volcano is delicious though, and it's fun when the waiters all take up the cry of "VOOOOLCAAAAANOOOOOOOO!" when one is being served!
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Liberty Tree Tavern
It was several trips ago that we ate there, we haven't gone in more recent trips 'cause the portions are so large. Good themeing, delicious food.
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San Angel Inn
That is what the restraunt in Mexico is called, right? My family goes there every time we go to Disney. Good theming (though it is hard to see your food!), and
very good food.
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Beaches 'n' Cream
Counter service...
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Tusker House in Animal Kingdom
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Flaming Tree BBQ in Animal Kingdom
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The Electric Umbrella in Epcot
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Pizza Planet in MGM
(food/layout wasn't very good, but the arcade is great for when the parental units are taking a long time to eat or plan where to go next)
Haha... long list...