While I agree that every family's taste is different and therefore you should have a family meeting, go over the menus and figure out what is best for you and your tastes. But in saying that, i will give you our family's opinion after going there for the past 7 years with 3 nights always spent at Epcot.
May I first suggest going to Germany to the Werthur's bakery and trying some of their fresh caramel corn? It is the stuff dreams are made of!!!!
Quick Service:
Tangierine Cafe--what an incredible, tasty and huge lunch meal. It would work for dinner as well. Only draw back is that the only dessert offered is baklava which my family does not like. But that doesn't stop us from eating their twice on our visits!!
Sunshine Seasons--the food court in the Land pavilion. Great selection, good food and great desserts.
Yorkshire County Fish Shop--a must for my husband for Fish & Chips.
TABLE SERVICE-
Coral Reef--has always been our favorite until this year when they changed their menu. It wasn't that it was bad but our favs were not there so we will skip it next year. However, they still had the incredible Baileys & Jack Daniel's mousse. It is to die for!!! We have always had good service but what is best about this place is the ambiance. Request a window seat and you will get to watch all the sea life up close. It is a wonderful environment and good food.
Garden Grill-if you want a character event, this is a nice restaurant. We hadn't eaten here in years because the last time we did, things were a bit heavy. However, my daughter and I ate here and requested steamed broccoli, along with the turkey and some other stuff. We enjoyed it for the ambiance (as it circulates while you eat) and for the characters. It's not fine dining but it is a nice place in the Land.
Chefs de France-we did lunch there and really enjoyed it. Ask for a window seat to people watch.
La Hacienda De San Angel-I think by far, this is the best restaurant for ambiance!! We always ask for a seat by the water. Very nice. My husband enjoyed it tremenedously but for me, not so much. Point is, even within families there can be differing opinions.
Canada--do for lunch. I would agree with another poster that it is good but not blow your socks off good. Therefore, it doesn't warrrant 2 table service credits (or the expense if paying). Lunch will give you the same feeling.
Italy--Again, nothing to write home about. Not bad but not incredible.
Biergarten--Great fun and wonderful ambiance. My family enjoys it for the german food, me, I would rather skip it.
May I suggest that you travel to our family's favorites by hopping the monorail--Our favs are Ohana's!!!!!! and California Grill which we just had the pleasure of trying for the first time this past September. Both are worth it--great food, great environment and a dining experience.
Good luck.