Very easy fish to photograph this guy.
I have found them shy to colour up in the past but he`s quiet dominant in relation to the other fish in the tank so he seems pretty much coloured all the time now.
They are a really great species, but I agree with you on the males taking awhile to hold their colour. I had a wild adult male that took forever to turn it on, but once he did, he never coloured down again.
It's a shame the females are so ugly!
Mine produced more fry than any species I've ever kept, I think.