I experimented with a sandwich during sixth grade camp just to freak out the other girls in my cabin. My sandwich had everything I liked on it - peanut butter, cheese, ham, turkey, pickles, maybe a little mayonnaise and ketchup. But when I tried to recreate it at home, the only ingredients we had were bread, pickles, and peanut butter! A peanut butter and pickle sandwich!

And now it's my favorite sandwich! I didn't realize until later on that my grandma actually used to eat them when she was younger, too! xD
Other than that, I don't really have any weird combos...