Things i have added to breadcrumbs over the years...note that most of these have been used to crumb chicken and veal...as I am not fond of crumbed fish.
Grated parmesan cheese
Powdered coriander
Morrocan spices
Paprika
Saffron
Garlic salt
Lemon Pepper
chilli flakes
ground cumin
curry powder- different types
Mustard powder
Come to think of it...i think i have tried every type of dried spice mixed in with breadcrumbs...with varying success
Favourites would have to be the morroccan spices, parmesan cheese and curry powder...but as I said...not on fish.
Greg