I knowingly ate talapia once, and that was the last time. It tastes like a goldfish bowl smells. Major ick factor.
Then it was either not properly handled in shipping/storage, not properly prepared, or both. Any fish tastes bad under those circumstances. Fresh, it has a mild flavor which is complimented by a variety of seasonings.
So apparently I’m not the only one who feels this way about tilapia. I’ve had it twice - once at home and another time at a restaurant as part of some sort of seafood paella or something like that (luckily there was other good, edible seafood in it too). Both times I thought it had a really nasty “off” taste - and I like seafood, including really “fishy” tasting seafood like macakerel, herring, salmon, etc.