I would hope that a restaurant choice would never make you sad, but I can understand how you could be disappointed in a choice particularly if you had to give up a chance at one of Disney's great restaurants. If it makes you feel better, Chefs is on my "must do" list for each trip - and has been since I went with my parents when I was little. Food's good, I find the staff to be very pleasant and friendly, and I like the ambiance. It is certainly not high on everyone's list, but I thoroughly enjoy it - and value wise the "french menu" at lunch can't be beat.
I hope you enjoy Chefs and the rest of your vacation!!