Never had a decent piece of pizza in NYC- cardboard crust, frozen paper think peperoni, canned tomato sauce... And every single place is named Ray's.
The original Spago's pizza in LA is much better- although not the ones in airports.
In Naples, my favorite is the slices of really thick crust, macaroni and cheese pizza- its kind like a Fugazzeta here. But without the onions.
As mentioned, Baffetto in Rome is my personal hands down favorite world wide.
http://www.flickr.com/search/?q=Da+Baffetto Rome&w=all
See that guy cooking em? He has what we call a "pizza muscle".
I disagree about the taxi gourmet- I have probably tried 20 of her picks, and, by and large, I liked most of em. She does not love, or hate, every one- her reviews range across the board, and I skip the ones she doesnt like.
La Mezzetta rocks.
And I am with her about the Bondiola stand on Dorego down in the park- killer, cheap, and great atmosphere.
She turned me on to Vicente, and it is great. Reasonably priced, great versions of the porteno standards.