I've had some pretty good casserole pizzas, I'm not going to lie, but my favorite is the New York style. Lucky for me we have some pretty good options here in Denver
EDIT: and to destroy any credibility that I probably never had, I actually liked Round Table Pizza the last time I was in the Bay Area. But in my defense it was my favorite pizza as kid (but they also went out of business in my hometown when I was a kid) so I have a soft spot for it