I agree with rallysman and cichlaguapote but going to go ahead and say from my experience. Out of the cichlids I have owned I would have to say jaguar cichlids. They have tons of personality and chased my arm while I cleaned the tank. They definitely did not like me invading their space. Just imagine an oscar that you ran over its dog, peed in its cherrios, smacked it across the face, and called it a punk b*@!% and now its coming at you. I think they have massive anger issues. Very mean fish.