I was on the Empress of the Seas when the boat was called Nordic Empress in 2002. the food in the diningroom was good and better than the windjammer cafe. Breakfast in the diningroom was better as well. Both are good though. depends on what you have planned fopr the day. If you need to get out quick for an excursion then you can try the windjammer which is buffet breakfast. Lots of variety form what I remember, cereals, eggs, french toast, muffins, etc.......... The diningroom had a few differetn choices for breakfast.
Which ever one you chose you wont be disappointed!