OK...I know it's pricey. But everyone who goes to Disney really needs to go there at least once. It is quite simply the finest restaurant in Disney World in many folks' opinions (including mine)...even compared to MUCH pricier places. Sure sure...Cali Grill is great, Bluezoo is excellent, Yachtsman Steakhouse serves a fine perfect steak, and Vicky & Alberts is a stunning presentation and top of the line food.
But when it comes right down to it...nothing beats Jiko: The Cooking Place in Animal Kingdom. Stunning appetizers. South Africa's finest wines. Unbelievable ingredients and flavors in amazingly delectable entrees. And lovely desserts with the finest coffee on earth, Kenya AA roast served in french press. It's not cheap - but it's sooooo worth it. I've recommended it to friends from 7-figure loaded to working-class incomes, and all agreed it was the finest meal and they intend to go again.
Now...that said, other favorites of mine include: Maya Grill (an oft-overlooked but quite good mid-price sit-down restaurant in Coronado Springs - if all else is booked and you want a nice restaurant meal, it's the place to go), Flame Tree BBQ (fast-food, walk-up tray service in Animal Kingdom - great meats, salads, wonderful BBQ sauces, and the most elaborate, huge, beautiful seating areas in all the parks), San Angel Inn (hard to beat the ambiance of this gorgeous Mexico-pavilion restaurant, in those gorgeous night hues and the steaming volcano over the river - and great Mexican food too!), El Pirata Y El Perico (tray-service in Magic Kingdom, right across from Pirates of the Caribbean...cheap, but tasty and nice different fare from the normal burger), ESPN Club (Bar food...and good stuff too - plus catch whatever sports game you happen to like, because they'll be playing them all! The Boo-yah chili is awesome - all meat, no beans, and spicy...great sandwiches, massive hot dogs, good salads, and full bar to boot - great place to kick back and enjoy a game).
Of course, some of the others mentioned are great too - I just thought I'd throw in a few others that I frequent pretty much any time I visit. I'll be at all of these in about a week!