Depends, really.
Salads- Grilled. Crispy is pretty good on salads too, but the juiciness of grilled chicken adds tremendous flavor to a salad
Sandwiches- Crispy. Grilled is okay for fancier sandwiches, but if I am just having a crispy chicken sandwich with lettuce, tomato, and mayo, I am really happy.
Sunday Dinner- Grilled Chicken thrown on the grill as the sun sets on a Sunday evening after mowing the lawn. Delicious. Couple it with a caesar salad, asparagus, and some potatoes (any type), that's a good day to me