I have a 20" Tiretrack Eel and everytime he sees me near the tank he comes out of his tube and looks at me, if I'm walking around the tank he'll follow me until I stop and acknowledge his presence, and when it's feeding time he'll eat from my hand.
The most pesonable fish I have ever owned has been my red devil. A lot more character than any oscar I have owned. He constantly begs for attention,and when he's ignored he will splash around to make sure he is noticed.