Mortadella Head pizza is.. ehh.. I like The Shredder from there but I find the rest of them to be lackluster at best and sometimes just awful.I tried a couple things from there, and thought the food (particularly pizza) was better back when it was known as Christo's. My favorite of the semi-local slices to there is Harvard House of Pizza, on Mass Ave between Porter and Harvard Squares. The square slices at Leone's and Pinocchio's are also really good but I think of square pizza as more of a novelty.
The slices at Mortadella Head are supposed to be good but when I tried them they were reheated poorly. From what I remember the dough was hot but the cheese was still cold, one of the worst slices I have ever had.
Mike's is obviously terrible and Domino's is Domino's.
EDIT: Angelina's in Teele is pretty decent, like a poor-man's Regina's. Armando's in Cambridge has solid/huge slices but isn't super convenient.
Dragon Pizza I have a love-hate relationship with. I like the space more than I like the pizza even tho the pizza isn't bad by any stretch - in the words of Dave Portnoy who nailed it, it's very Parmesan Forward / Heavy. Also they are soooo sloppy when serving multiple slices to go. They just throw them in the bag and you get a pile of gooey slop.
My goto these days for "I need pizza now" is just ordering from Joe's in Harvard.
I dont mind Mike's calzones but they're a rarity for me unless I'm forced to go there by friends.
The area could really use a new pizza place or two.