My fave is Japanese, easy. Not only are the foods always healthy (except the tempura LOL) the presentation is just so beautiful. The only downer is it's so expensive! Even a humble bowl of ramen, is really much more complicated than you'd expect, esp if you're used to the instant kind!
But I really love lots of kinds of foods, and I like most every kind of cuisine. Still haven't had a chance to try Ethiopian though!
Let's see...my favorites
Japanese: uni sushi of course
Chinese: wonton mein, honey walnut shrimp (tie)
Korean: any kind of bbq beef
Thai: green papaya salad
Vietnamese: bahn mi dac biet (that means special combo baguette)
Indian: braised lamb shank or that curry veggie dish with califlower, peas, carrots, etc
Mexican: lengua and cabeza tacos, huitlacoche (tie)
Colombian: bff's mom's beef and potato empanadas
Salvidorian: pupusas, fried plantains with creme (tie)
Italian: real style thin crusty pizza
seafood: if not uni, then crab, shrimp, or lobster
soul food: Roscoes chicken and Waffles, and their egg cheese and onions
Persian: lamb lule kabob with that rice with the cranberries in it
comfort food: mac and cheese
food truck: Lime guys are pretty dang good
guilty pleasure: Del Taco deluxe nacho fries

salad: the sashimi salad from Kaori, my fave japanese restaurant
snack: pickles, olives
I'm sure I'm forgetting something.