In the Bite kitchen we are in the habit of referring to fish that is not snapper, tarakihi or gurnard as "other fish". These "other fish" are the ones we would like you to learn to love. I have never had a problem with kahawai or trevally, which many find too "dark" or "oily", because they have plenty of flavour and we all love that.
Yes I do love a fresh, juicy piece of pan-fried snapper but I only eat that which has been line-caught by my father so I don't have it often and it has become a treat. (It's hard to catch fish on the golf course, aye Dad?)
If you are buying fish it is your responsibility to ask your supplier how it was caught so that you can help ensure we are not fishing our seas dry. And the more "other fish" you buy, the better the supply will be, which means it will be there when you need it because a fish cake made with kahawai is infinitely better than one made with snapper. Try Ray McVinnie's recipe for kahawai fishcake salad.