I know what you mean, Ainippe. I cannot stomach the smell of spicy food. Nowadays, airlines like to offer curry items. Even though these are described as 'mild' that is still x10 what I can take.
One of the worst was coffee. As with spices, I cannot abide the smell (leave alone the taste) and there was a BM service in Biz (Diamond, I suppose, not a regular on BD) from LHR to ABZ the first out one morning. They were boasting about their filter coffee and the chap next to me had one of those large flagons of the stuff and was waving it around saying how fabulous it was.
I was holding my napkin over my mouth and nose, as the English breakfast was very good and I didn't want to lose it ...
