I have two.
The Wave at the Contemporary - lots of choices, great price for a buffet, and discounts available, plus it's usually a walk in. I don't like the dim lighting feel. They should have named it The Wave in the Cave. But for the convenience I'm there.
1900 Park Fare - Here I like the atmosphere, the characters, the food. Have to make ADR's usually, but have occasionally walked up. Uusally have to wait whether I have an ADR or not. I plan this when I'm not rushing off somewhere else. This place is not relaxing so if you don't like hustle and bustle before noon, have a second thought.