my favorites are tuna ("Toro", "Chu-Toro", "Oh-Toro" etc), yellow tail ("Hamachi"), abalone ("Awabi"), salmon cavier rolls ("Ikura") or any fish and seafoods unless specified below.
i dont like fruit rolls like avocado

that seems a sort of fake.
and i personally avoid sea urchin rolls ("Uni") either because of too sweet taste, though many ppl think its delicious.