I have had a few varieties. Here are my experiences:
Blackmouth - cute when young grow up to be very large and very mean to everyone. Never get unless you have a shark tank and need food for them.
Clowns - love them, but when mated, they get territorial
4 Stripe - fine alone in my 40g with a clown, but territorial and I would never add another damsel in there.
Azure - love these guys. Had one alone for years in a frag tank. Currently have 6 in my 210g (3 did not make through QT). They have their spaces and do not bother anyone except their con-specifics if they get too close. Oh, and the lemon has taught them how to bite me when in the tank. Luckily they suck at it and it does not hurt.
Lemons - very territorial and do not like others of own species. Mine are a mated pair, but only are near each other during mating. Otherwise stay far away from each other. Like almost 6ft in my tank.

Male loves to bite me anywhere in the tank. He goes right for the soft tissue in the wrist. Nutty fish.
Talbots - stick to themselves and do not bother a thing. I have 3 in my210g. Two stay within the same area and the third is on the other side of the tank. funny guys as they like to move sand to make little areas under rocks. Very docile and never go after me.
I have had
chromis and just never liked them. They picked each other off.