Not that much really, I just buy groceries and eat that. When I used to have a real job many years ago I spent more because I ate out a lot.
When I go into the real world and actually have to leave my house I tend to spend more on food...
But when at home (which is most of the time) I don't really eat too much... Plus we cook a lot. My boyfriend enjoys to cook, and when we eat at home it barely costs anything.
Plus I eat to live, not live to eat
If you can afford it it's fine, if you like food you should enjoy it. I am just the type of person who is very CHEAP and doesn't like to spend money on food, since it only goes in and then comes out, so I don't care that much bout it.