I'm with BV on this one. I like to vary my proteins. I always keep Optimum Nutrition Tropical Gold standard and regular chocolate on hand... but soon for my lattar meal of the day, I am going to incorporate some caseinate. Probably down the line sometime, I will order some isolate. Love the tastes that I have tasted so far... just really expensive.
As far as solids, I usually eat steak, chicken, fish.