We need more of the styles NPCs get access to. When the /costumecreator commands were still usable you could see some of those. My personal favorite is Slicked Back 05--by far the best looking style for any race with forehead ridges, especially Cardassians!
I agree we could use more hair on all races... with the exception of Gorn and Saurian (that would look weird) I would prefer we stay away from the ANIME hair styles and stick with more realistic ones. I got a friend who I know would love Jean Luc Picard's hair style (yes the man has or had hair). Just use the entire series of all the Star Trek and all the movies as references.
Would be nice for more hair styles. I want to give my Rommulan long hair with Bangs. (Yeah it's the Vulcan toon, but hey close enough for a Romulan. ) Since hey Spock had long hair in The motion picture. Why not?