Well, I have owned my fair share of fish both reef safe and not. My dogface puffer has to have the best personality of any fish I have yet to own. He is a very expressive fish whom you often feel like he is trying to communicate with you by how he looks at you. A very smart fish and has a suprisingly gentle demeanor. He is the bigest fish in the tank, and when any other smaller fish give him an occassional shove he does not retaliate and just shrugs them off literally by raising his head with a look on his face where you feel like he is thinking, "take it easy". He knows me as opposed to other people and reacts differently when I approach the tank as opposed to someone else. He will watch you as much as you watch him. Without any training, whenever I motion with my finger to come up to the front glass he leaves the rock work to greet me at the front glass. It is amazing because sometimes I approach the glass, and he remains laying down on a rock staring at me. I then motion with my finger, and he gets up off the rock and swims up to the front glass. Every night he watches me open the freezer to make food and shows excitement knowing that he will be fed soon when I do so. All have to do is hold up the white plastic spoon I use to feed, and he goes absolutely nuts. When he gets real hungry, he will swim with his face pressed up on the front glass and grind his teeth staring at me waiting to be fed. He will move on the front glass to the postion closest to where I am standing or siting at the time engaging in this behavior.