For me, Lays and Doritos are kind of equal to each other. Both have unique, wonderful flavors and each are pretty good. But I do like potato chips over corn chips and after a Doritos chip has been in your mouth for a fraction of a second, the flavor is instantly gone. I vote Lays.
Even though the sour cream and onion lays are awesome, doritoes nacho cheese and cool ranch are just classics. Especially for parties and sports events. =)
This isn't really a Battle of the Brands... It's more of a flavor competition. (Frito-Lay makes both Lays and Doritos.)
I'm going with lays. Nothing like sitting down with that ice cold soda, popping open that bag of chips, and sitting back watching football. Doritos make too much of a mess, and besides that, they can scratch your throat up. =P
I don't always eat chips, but when I do, I prefer Lays. Mostly because I'm usually on my computer and I don't want an orange'd keyboard. But Doritos are better for dips or doing something that doesn't involve hands, like watching TV (but then the remote gets orange'd).