I'm too much of a picky eater to have any really weird combinations, but once upon a time I was known to enjoy peanut butter and butterscotch sandwiches on dark rye. Yum. (Now all that sugar would make my jaw hurt, but I digress.)
I remember that my mom used to make me fried banana and bacon when I was a kid. It was a great combination then...but when I tried it as an adult...not so good really. lol
I'll eat french fries with virtually ANY kind of sauce... And I'll eat peanut butter as a dip/condiment on virtually ANY kind of food! Hehe.
I've totally had a peanut butter/marshmallow fluff sandwich! Known as a "fluffer nutter" around these parts, hehe. That is soooo delicious. Perhaps it sounds weird, but I'm sure it doesn't seem too crazy that it'd taste good. Cuz it DOES. Haha.
Also, chips with mustard... bananas and pizza sauce... and french fries on my burger/chips on my sandwich... and cookie dough with already baked cookies :-X
Fries with cocktail sauce (ketchup & horseradish) or blue cheese dressing.
Bagel with cream cheese, green olives & capers (my daughter's invention)
Cereal with orange juice in the bowl instead of milk.
Feta cheese spread on Greek bread. (Alex, my co-worker from Greece told me today he eats Feta with everything, for example, feta with Chinese food, but he never spreads it on anything.)