We don't have aquariums set up right now. But when we did, we saw personalities shown by Oscar's for sure! Black Molly's also did, as well as a puffer, lionfish, yes, Jack Dempsey's, clown fish, and the seahorses. Seahorses have those incredible big eyes and they seem telepathic, seriously!
Those are just the ones I can remember the most. But honestly, pretty much all the fish took notice of us, not just in fear like you would think.
I LOVED having both salt and fresh. Hubby was the expert, not I. After pursing this thread, thanks by the way, I have said fish have personalities for years. I would like have him put some up again.