Almost 15 years ago I would go into a pet shop in Sioux City, IA and in one of their reef tanks was a fish that would literally come to the top of the tank and squirt water about 3 inches out of the water. I can in no way remember what the fish even looked like, I was 12 at the time, but it was almost as if the fish was playing a game. Whereever you would move your hand the fish would follow and squirt water.
I think that is the exact time that I knew eventually I would accquire a saltwater tank. 15 years later and I will be acheiving my dream within a year. Used to have about 1500 gallons worth of FW and we had Oscars that would brush against your arm almost like a cat, and others that would try to take your thumb and eat it.