I don't eat chips very often, in fact quite rarely now days.
Salt and vinegar are typically my go-to, or Ruffles. I'll use Fritos mostly in cooking stuff (basically I use them to add a little extra crunch to quesadillas. Leftover shredded beef, good cheese, hot sauce, and fritos makes for an easy quesadilla for when you're too drunk/stoned to do much more than throw shit into a pan.
I like to dip Ruffles in baked beans, which sounds weird but I learned it from my sister and it's good. I don't do it very often, but it's pretty solid with American baked beans since there's usually more sugar, a nice saltiness to it.
Salt and vinegar Taytos are what I'll eat back home. Tayto, (Irish brand) were the first to put flavour on chips, they're similar to lays, just maybe a step above because our spuds are better. They also have a pretty standard cheese and onion one, but the flavours you can't find in the states are Smokey Bacon and Prawn Cocktail, which are better than many may think.