At Hollywood Studios, we have the same routine every time--which I love!
We always schedule Hollywood & Vine before park opening for breakfast. It really makes a difference to eat there early. Later in the morning, it is not as polished as it is right at park opening.
Then, for lunch, we either eat at Sci-Fi or 50s Primetime. Both are fun experiences. We never venture beyond the burgers and onion rings at Sci-Fi, but those are fine. What I like best about Sci-Fi is the old movie clips and purchasing a glow-in-the-dark ice cube with my soft drink! It's so much fun to have those glow cubes in a really dark restaurant. If we dine at 50s Primetime for lunch, we stick with the fried chicken or the pot roast. Both are good (although a little heavy for summer). We also engage the server in a little silly banter to make the experience more fun.
Then, for dinner, we usually eat at Mama Melrose's, which I love! I usually order the wood grilled tuna, and it is outstanding. Sometimes we go to Brown Derby for dinner instead, but the food has been hit or miss the last couple of times. Back in 2002-03, the food at Brown Derby was outstanding. I miss that.