Our family - on the other hand - really enjoys San Angel. The whole notion of being in an intimate plaza at dusk(no matter what time of day it is)... Perhaps sitting along the Rio del Tiempo... Looking up at the pyramid... Disney magic at its best. And its been a year or two since our last visit, but I still remember the CM who served us our meal last time out. He shared with us about his town back home, and how he and several other friends were planning on seeing some of the other states before returning to Mexico when his hitch at Epcot was through.
But the real reason to go is the food. We've always been very happy with the flavors and varieties of food from the appetizers straight through to desert. I, personally, don't care for seafood. So its not too likely I would choose Flying Fish. That - as they say - is why there is chocolate and vanilla. Best of luck on your decision !