This is a fish that you have to season and flavor yourself - kind of reminds me of: I don't know where you buy your fish but mine don't come seasoned
I like to use tilapia in my fish stew but I still let it set on the counter with salt and pepper on it - it just brings it some flavor once added to the stew. I do the same thing if I use cod instead.
Caine has a wonderful suggestion with marinating. Sesame oil, spring onions, sherry, ginger, garlic, brown sugar.......those basic Asian flavors would suit this fish well.
As far as a way to bring flavor to the fish you could use:
topped with a fresh pico de gallo on a bed of black bean coulis
Just know that tilapia is a delicate fish and cook accordingly.