There one of my favorite tangs. They tend to be a little shy but aggressive feeders. Mine will pick at the back of my tank where a little algae grows and really enjoys sheet seaweed. I guess the only bad thing of mine is that he tends to hide behind the rocks when anyone approaches the tank, not for very long. as for aggression toward other fish , mine has never shown any, he is the biggest fish in the tank and he never messes with anything else. Mine would take a nips at my colt coral when i first got him , but not anymore.
HTH