Back in college my go-to was Papa Johns. I was a skinny fuck back then so I'd order a large and get 3 or so meals out of it. My favorite was their buffalo chicken. There was a Domino's next to where I worked and sometimes I'd get pizza from there too, but it was never my first choice.
Nowadays I can't stand pizza from any of the major delivery chains. I don't know if their ingredients have just gotten worse over time, or if I'm just getting pickier in my old age. I live in a small town now and if I want pizza, I get it from a locally owned place that uses brick ovens. It's some of the best pizza I've ever had.