I have hand fed everything in my 700 gallon. I was feeding shrimp tonight and the only way I was going to let the fish get anything was if they actually came up and took it from my hand. The ones I have been having a hard time with are my jardini, peacock bass, and my clown knifes. Well tonight they took it straight from my hand. Its funny because while I am trying to hold the food underwater for the fish I am constantly having to avoid and watch for the pacu coming in and trying to take it. They certainly are not shy fish. So now everybody in the tank is comfortable with taking food from my hand. 
Pix would be great too! 