I guess I forgot to read the surveys because I mix anything with anything just about... I love Salsa/hotsauce and mayo for tator tots, homemade hot sauce that has ketchup in it, heck..I made a crab pasta salad this morning that has 3 kinds of hotsauce and chilis, mayo, AND two kinds of mustard.
LOL... WHen I was a kid I'd always mix the Ketchup & Mustard for hotdogs...still like it for corndogs 'cept now I add hab sauce as well.