in general, yea, peanut butter and the like seems to dominate our range of stuff...i love a good reese's peanut butter cup every now and again, but i could name countless other things i'd rather have..
most americans really have no idea as to what other kinds of chocolate bars are out there...in showing my friends all my wrappers and having them taste new acquisitions, they totally realize how sparse our variety is here and wish we would have a lot of the stuff offered abroad... as for everyone else, though, unless they have opportunity to see and/or taste what else is out there, they'd have no idea...
i would LOVE a coconut kitkat, but can't say i've ever heard of one ever having existed...