Do not like virtually any traditional breakfast fare - eggs, bacon, hash browns, sausage. Find them way too heavy, I want some kind of cold cereal with milk, some fruit and juce. Will live on toast and jam if I have to. Easy to please though - any non sugared cold ceral will do
Omeletes where the guest picks from a list of fresh ingredients is easy to do, inexpensive and welcome change for most. (About the only way I will eat eggs)
Mid morning cookies when diving are great, fresh vegies in a salad at both noon and evening meal please. Not just lettuce, add some local ingredients for interest. Maybe a pasta salad one day. A couple of choices re meat at dinner, stay away from deep fried anything, if you do give some other baked choice. A vegetarian choice is a good idea, not a vegetarian, but will often go that way for some meals.
Soup with last nights leftovers, at noon even if its hot works - got to keep hydrated and water gets boring fast with the amount I need to drink when diving.
Mid afternoon snack is a good idea, does not need to be expensive.
Can never have enough fresh fruit for me - local fruit - whatever is in season is a good idea to keep costs down and interest up.
5 dives a day burns alot of energy so I tend to eat a bit more than I usually do. Let people create their own portions.
This is a vacation so desserts should be something special at least some of the time.