It's cliche but I always love aa good bit of salmon in my sushi
I also like the red caviar sushi (although I'm not sure how readily available this is in Japan). Oooh and octopus, om nom nom
Also I tried some peking duck sushi last week, not really proper sushi I know, but it seemed like a novel idea and I just had to have some
It was really nice! There was duck (of course), spring onion, cucumber and plum sauce inside the nigiri. Delicious!