1) Sicilian
2) Italian (yes there is a difference)
3) Portuguese
4) Spaniard (as in Spain, not hispanic)
5) Americana
Yes there is a difference in Italian and Sicilian foods and dishes. I for one love the Sicilian delicacies like Panelle, Arancini Di Riso, and Caponanta. But I tend to group them in with Italian foods in general.

As for Spanish food, like you, my preference are the traditional dishes from Spain and not the Hispanic styles. Although there are some Hispanic dishes that are delicious.
Burgers. Hmmm, that's a tough one. If we are talking fast food chain burgers, I might have to go with In and Out Burgers which are very popular out west, specifically in California.