Did the taco salad have fritos and catalina dressing in it? Frito Salad is usally what I take to a potluck--no kidding.
It had Doritos and Catalina dressing :/ Maybe if chopped chicken had been used instead of hamburger...
I usually make the Best Foods classic potato salad, the rip off version of KFC's coleslaw, or a homemade Italian pasta salad.