I'd have to agree with Kohno, but to flesh it out more: Asian is always good, but I'd have to pick Mediterranean food, if we're talking one cuisine for the rest of your life. You've got Portuguese, Spanish, Italian, North African and stuff from all over the mid east. That's basically every combination of flavor profile even before you get into fuisioning (that's a word right?) them together.
Maybe that's too broad?
I eat mainly a pescatarian diet and besides liking that food the best, I usually feel the best after eating it as well.
Nothing like steamed/smoked/grilled Salmon with butter, lemon and spices with some asparagus and hollandaise sauce to the side and some Turkish coffee for desert after a day of evening/late night mountain biking.
Quick story: My dad worked as a barista when I was born and he made Turkish coffee in an Ibrik pretty often when I was around 9-12. We'd have rose Turkish delight with it.
One day, we were asked to give a presentation to the class when I was in 4th grade and I chose to give it on the that coffee. There I was, already an outcast, drawing and describing this small, copper pot of coffee made over a little flame with Turkish delight beside it. The class is just blankly staring and the teacher is squinting and blinking at the board, adjusting his glasses, trying to figure out what I'm talking about. He was a no nonsense, ex-navy, religious type.
I got my ass kicked during recess after that lol
One of my favorite memories, in all honesty.