I spent my first 18 years on LI, moved away in '98. Been wandering the diaspora long enough to have found delicious pizza here or there. Sometimes NY-style, oftentimes some other style. Different, but delicious in its own right.
Never have I missed NY pizza more than the last couple years while living in St. Louis. If anybody has some secret knowledge about where to get a good pie around here, I am all ears. NY-style preferred of course. Racanelli's, Dewey's, not so much. Don't make the grade. Some other style ok as long as it's delicious! Imo's, ugh.
On the other hand, for any NYers visiting STL jonesing for some Chinese food: I'm pleased to suggest Sesame on Watson.