There are some really neat damsels that are available...
In my collection of fish I have the classic blue damsels which really are great looking fish. I have 2 for the past 4 years and recently saw them spawning. Also the Fiji blue damsels with the royal blue body and orange tail are nice.
Starkii Damsels are very striking fish, but these can get pricey.
Stegassi, these are white, black and yellow. They stay at about the 1" size and they get along well with others.
Yellow damsels - Just like the classic blue but yellow. There are two kinds of this fish, one is a pale canary yellow which are reasonably priced, and then there is a dark golden colored one, which is very cool, but very hard to find (I haven't found one yet).
I picked up a damsel which I don't know the name of but the front half of the fish is Yellow and the back half is lavender.
There are lots of really unique and colorful damsels you can add to your tank. They all are active fish and with enough they keep each other in line.
Dave B