its like any fish some can be bad and some can be good.
at the moment my silver is a little more aggressive than the others, the most aggro tiger i had was an IT around 6'' he was mean as hell.
we decided to put him in the tank during the peacock bass water change.We did a good job removing the old piece of drift wood and replacing it with another and we took out a large rock that was in there as well.He is hiding but does not seem afraid of the peas.So far so good.