The reason while little fishes run and hide every time you walk by because they're afraid you're the type of big, scary fish that everyone enjoys keeping on this board. Bigger fish are so much more interactive. I started out like the normal hobbyist with a ten gallon. I was 10 years old and all I had was the Tetra beginner's book for noobs. I tried all of them...mollies, barbs, gouramis, etc but sooner or later I had a craving for something bigger, like oscars, eels, and the like. I had a couple of simple fish that I liked basically because they wouldn't die. There was a rosey barb in my tank that lived for 2 years with little or no water changes and irregular feedings...