Hmmmmm...
I can't possibly choose.
I love good Indian food.
Indonesian, Thai and Vietnamese are favorites,
as are Japanese, Chinese (Szechwan, Hunan, Mandarin, Hong Kong), Korean (I LOVE Bulgogi!!!)and Himalayan.
African and Ethiopian rock.
BG already covered why Italian is awesome.
French and Mediterranean are great for all the same reasons.
Caribbean, Mexican, Cuban, Hawaiian... All incredible in their own way.
Good old American style.
Barbecue, Burgers, Thanksgiving dinner with all the trimmings, Club sandwiches and California salads. From New England clam chowder, to Western omelettes, U.S Cuisine is incredibly diverse.
I haven't mentioned northern European food.
Swiss Raclette and fondue, German Wursts, Swedish meatballs, Belgian chocolates...
MMMMMMiddle eastern. Falafel, Shoarma, Hummous, Baba ganoush...
I know as soon as I post this, I'll think of a dozen more that are my favorites.
EDIT:
Fish & Chips, Yorkshire pudding, Bangers & Mash.
UK favorites.