My LTA has been host to pinks, clarki's, and maroons.
The pinks were by far the friendliest, but they just didn't "pop" in color and I couldn't really see them often.
Maroons have looked prettiest IMO, but they can be aggro to fish or you(the one I have now has bitten me and drawn blood many times)
My clarks were the best at feeding nem for me, but when they started to mate they THRASHED all other fish.
This has been my exp.