a lot of people around here put mayo on their fries... I don't like mayo, but it's really common around here.
I put cheese whiz on my fries... I know, ew!
I don't think I have any really strange combinations... I guess it's kind of weird that I put chopped green pimento olives in my kraft dinner (kraft mac 'n cheese in the us?)
Oh! I do have weird one! A few years ago, my friend and I came up with a really good combo after *ahem* smoking some funny stuff... Try buttered popcorn and Nacho Cheese Doritos. You put one popcorn on top of a chip and eat them together, wow! It's cheesy crunchy but with soft puffy smoothness at the same time! As rediculous as it sounds, it's really good even when you're not a little loopy.
P.S. Haven't smoked since then, but this combo is still in my favorites!