Exactly what I too am like, don't like sports much but did watch occasional cricket matches. Now I watch only news and a few serials or movies I like. I like to eat either roasted peanuts or a fruit like an orange or pomegranate etc.
This is a good question because it is noticeable that in the grandstand of a sports field or arena there are the vendors of snacks and drinks. When at home I would just munch on anything available to me.But when I am watching mixed martial arts I have no appetite to eat maybe because of the violent action that is on the tv screen. When I watch tennis, yes, that is one good game for a snack like nuts or even a sandwich.