If you're used to WDW food, be sure to give quick service a chance. I've never been to WDW but I've heard the QS options there are not very varied or good quality, which might be part of why restaurant reservations are so important there. At DLR a lot of our favorite meals are QS, so we typically only plan one TS meal (if that) per trip. However, being able to stop and grab whatever we're in the mood for whenever we happen to be hungry suits our style and that's not the case for everyone. Many people are accustomed to having full meals and specific times every day, and if that's the case then having TS reservations for a good number of your meals might feel more comfortable and keep the kids in their routine.
For TS, our favorite place in the park is Cafe Orleans - we always go for lunch and get pommes frites and soup. We didn't enjoy the food at Blue Bayou, but the setting is unique. We thought Carnation Cafe was pretty good, but not a must-do. It has mostly comfort food.
For QS our favorite is Pacific Wharf Cafe, and the other QS places right next to offer variety in case not everyone wants the same kind of food. Jolly Holiday is a nice place to get soup, sandwiches and pastries. Jazz Kitchen Express (in DtD) is good too - I've only been there for breakfast but their lunch menu looks pretty good. There's also the full Jazz Kitchen if you want a sit-down meal.