My Hubby and I have been 3 times and are planning a 4th trip for Oct. 11-24!!!!
When it was just the two of us, we found that a budget of $45-$55 a day was good. We tended to buy a few breakfast items to make in our room (english muffins/cereal/power bars) we aren't much of breakfast eaters though. For lunch we would hit the parks and usually try to spit a meal at a casual dining place. THe meals are pretty large. A really fun recommendation is the Sci-Fi Diner in MGM. We would get an appetizer and a meal to split and be out of there under $20, plus we got to get out of the sun for a bit and enjoy the neat atmosphere. Our favorite lunch areas were:
Magic Kingdom: Tommorow land (can't think of the name, but it is the big cafe in the back corner) when we were there, they had HUGE portion Caesar salads etc.
MGM: Sci-Fi Diner, Prime Time Diner, and there is one cafe place back in the kids area with pretty good italian food.
Epcot: We liked the outdoor mexican food place (only had nacho's) I'm so bad with names, but there is a large building in one of the corners that has ton's of food places in it. You can also go on a floaty boat ride to see how they grow food etc. Anyway this place has baked potatoes, salads, anything you could imagine, this building has it. It's kind of tucked back off of the main paths. Epcot pretty much has all good choices of food, for pretty reasonable: One quick tip: If you're thirsty and want a free drink, after the entrance to the park you can tour a CocaCola fountain place: Keep in mind it's cola products from around the worl and they are all free samples: all you can drink, but there are some pretty nasty flavors in there, so beware!!!
Animal Kingdom: By far we love to go to the Dinosauer (sp) pizzaria. There they have all kinds of yummy Italian food. I highly recommend the breadsticks.
We always plan one or two trips to a nice restaurant whilw we are there, and one experience we will never forget is at the Polynesian resort: O'hana's ($40 a person) All you can eat EVEYTHING!!!!!!!!! It was soooooo good.
We also liked to eat dinners at Downtown Disney. Planet Hollywood had great prices for large portioned meals. Also loved the Caesar salad of House of Blues. Garlic mashed potato's at Wolf Gang Puck, you can't really go wrong at Downtown Dis.
This next trip we are planning in Oct. will be our first trip with a child. We had a baby and he is going to be 13 mo old. True he won't be needing his own meals but splitting one meal may not be our answer anymore: so we have upped our food budget to $60-$70 a day. (keep in mind some days you will spend more than others)
Important Drink Tip: We learned the hard way, when you're thirsty, you need a drink!!! So we used to buy a large coke to split. Well that got expensive and the cups are all ice anyway, so what to do is this:
Order a small or medium drink WITHOUT ice!! (depending on how many people you have) and then order a large cup of ice (some places may charge you for the cup $0.25, some places don't) then pour your no ice pop into the cup and you just paid for a small drink and got a large!!!
Good luck! Eating is a blast but expensive!!!