Yeah I have a 10 inch rhom and he is very boring. I always heard they are super aggressive but he is not at all. He rarely eats. If he does eat he eats at night and not infront of me. He never moves from his spot unless the lights are off and if he sees me move he hides. He is a pussy. I have had other fish with him and he never tried to kill them. I had a solo red belly that was much more aggressive than my black rhom. I now have 4 red bellies. They are known to be shy but you can work that out of them. Plus reds are way more fun to watch eat. In my experiences I would say go with the reds. Dont forget they are WAY cheaper and easier to buy.