Well my favourite pizza place I've eaten from was a restaurant I went to in Gran Canaria called Da Pinocchio. It was a general Italian restaurant but half the menu was pizza so it was basically a pizza place. It was really fancy though, proper Italian pizza, extremely thin base, could barely even pick it up with my hands. I had a "Pizza Scampi" which was a prawn pizza (I was a pescatarian at the time so had to eat pleb pizza) and oh my god it was amazing. I only got to eat there a few times but I seriously haven't tasted anything like it since. It was awesome. It was just cheese, tomato and prawns with the usual Italian miscellanies but it had some kind of stock covering it as well which gave it this amazing flavour.
They were also the only restaurant out of the literally hundreds that covered the district that didn't have people stood outside chasing you down the street trying to drag you in so that was a plus.
In terms of local chains, Domino's all the way. Used to love Pizza Hut but one day their pizzas started tasting disgusting to me all of a sudden. I get myself a takeaway most weekends and I usually go for a Domino's. Large Meateor pizza, Domino's stuffed crust, replace the BBQ sauce with extra tomato sauce. Get some chicken wings & garlic bread pizza with it on the side. Heaven.
Don't know what they did with their sriracha chicken wings though. I was sad to see them go. They were lovely.