Doritos are interesting in that they contain basically no natural ingredients whatsoever. Okay, slight exaggeration there...very slight, probably.
I do always find myself amazed when I wind up at the register at a local convenience store and they have out a display with Doritos "flavors" - it seems every few months they come out with something even stranger than before, and occasionally they are so weird, I buy a small bag just to give them a try. Sometimes they're awful (the new Late Night Cheeseburger is disgusting, but that's probably because it tastes too much like pickle and I despise pickles), sometimes they're okay (the Late Night Jalapeno was pretty decent), and sometimes they're actually pretty good (the Black Pepper Jack worked really well for me...of course they discontinued that one).
Probably the most bizarre one I've seen was the "Quest mystery flavor" they came up with a while ago which attempted to blend two gamer addictions by creating Mountain Dew-flavored Doritos. Although apparently the Oriental markets have Sausage, Peking Duck, and Fried Chicken and Green Onion Sauce flavors, which may be even odder.