I generally like pasta and pizza in more or less all of their forms (except the ones that include any kind of seafood, which I'm definitely not fond of). As for the dessert, I wouldn't be able to pick out a favorite one, here any region (heck, even any province!) has its own typical dishes/desserts and I pretty much like to taste them when I get the chance.
With that said, I'm not one of those Italians that, when around in the world, always complain about how badly they eat, quite the opposite in fact as I love trying out what local cuisine of the places I visit has to offer!