Favorite protein is an interesting thought, I'd guess tofu is not going to get mentioned affirmatively.
Good smoked salmon would be near the top, for me. Obviously a really good steak. A lot of types CAN be good of course, really good BBQ is tough to beat as well. I had ribs once that spoiled me. Really good brisket, pulled pork, works for me.
Actual fresh fish cooked properly would be up the list but very hard to access these days, walleye, NP, mountain trout, yup, arctic char, ... then scallops, probably my favorite seafood, king crab lags, not so much for lobster, really good Calabash style shrimp works for me, but tough to access of course. Lamb and duck are common in France and usually excellent.
A bit of an oddity, I used to go bird hunting, dove mostly, they are really good if small.
Of course, the universal favorite would be eggs, I have to think that so.
