People who say " I don't know how you can eat that at this time in the morning"Watch
I only find it relevant when talking about breakfast. I agree with you if it's any other time of day, like if I'm having cereal for dinner and they're like 'wtf that's just for breakfast'
I think it depends on how you view food, whats pizza? Cheese on toast, and lets face it there are millions around the world who eat rice for breakfast (although maybe not through choice). Its just that in the developed world we are taught to eat certain foods at certain times. I'm not sure if there is any problem with digesting different foods at different times but can't see any reason why there would be.
A lot of this is simply cultural. I once has soup for breakfast at my partner's parents' and her mum thought it was weird!
RE some people not wanting to eat in the morning: most (younger) people tend to have a natural sleep cycle which is quite late (i.e. naturally fall asleep in the early morning and naturally wake up 9-12). If you have that and force yourself awake early for social or more likely work/education reasons the your body just hasn't caught up and of course your appetite won't be there yet. I'd bet if you were just left to wake up when ever your body felt like it you'd be hungry quite quickly afterwards.
For the sake of adding to the group:
I tend to have things like yoghurt and fruit (and sometimes something like oats), bacon rolls, cooked breakfast (eggs, bacon, beans,maybe some sausages), toast and soup etc for breakfast.
We bought a curry the other night and i ate what was left of it for breakfast.
Cold curry = best breakfast ever!