Mussles
Scallops - the bigger the better
Soft shell crab. I could live and die by soft shell crabs.
Lump crab cakes (panfried, never deep)
Fresh gnocci or ravioli
Pearl couscous
“high class” mac n cheese - gruyere, romano, etc.
Kimchi
Most things, even things I really like, are things that (a) I prepare at home–like shrimp–, or (b) so ubiquitious I can’t honestly say I’m more likely to order it–like steak.
The two things I can think of that I like a lot, never buy or prepare, and are not too common on menus are:
Liver
Brie
Anything with either of those two will likely get my vote. I guess Bleu Cheese (on a non-salad dish) would also count.