That is exactly what we are doing on our next trip (celebrating our 20th anniversary!). Our dinner reservations are all at
signature restaurants where we will be able to splurge on an appetizer, entree, dessert. We then have some days where will have lunch at a table service restaurant and a few days where we will have breakfast instead. With 3 credits a day per person, a signature restaurant takes 2 credits and table service (whether breakfast or lunch) will take 1 credit for a total of 3.
With all the food included in each meal, I can't imagine sitting down to eat 3 times a day; we think eating twice a day will be plenty for us and our sons (even with their insatiable appetites). With two snack credits a day, we are planning on getting some fruit, milk, and light breakfast items to keep in the room. And any leftover credits, we like to buy little boxes of fudge to bring back to friends and neighbors.
If you are unsure about some dining destinations, you may want to check out www.disneyfoodblog.com; it is a great additional tool to help with all the many, many dining selections.
Bon Appetit!