There have been a few times where I've kept shoes on indoors. Mostly due to a quick visit or drop in and there being no need for such a hassle. I can't tell if it's because I lived in Japan in my early life or simply because I don't want to track dirt into the house, but I take them off. It only makes sense.
It's pleasant to see that all the votes have been for deep dish. Even if there's only 4.
I personally could never see how anyone could enjoy eating pizza ingredients on a cracker, but to each their own. I'll eat pizza no matter what, but if both kinds are present, I'll be going for the deep dish until it's gone.