Yup, Shaun of the Dead, Hot Fuzz, Paul and The World's End, now those are movies that initiated many an intellectual discussion!
Ach! Everyone here is missing an important point about the Cornetto trilogy. They each have a strong libertarian/individualist undercurrent that is pretty easy to pick up on. It’s quite subtle in Shaun but by the climax of World’s End you’re getting hit over the head with it. They are far from mindless despite the action and often juvenile humor. There is quite a bit of sophistication in there as well if you are attuned to it.