I don't think anyone can say they consistently grow nice thick green turf algae?
It's been mentioned before: We strive for this type of algae cause it has the best filtering capacity, is easy to clean, and looks cool. But if you have high water quality with whatever algae is growing on the screen and your display is free of nuisance algae, then there's really no problem to loose sleep over.
But many of us have a need to tinker with things until we achieve perfection. So it doesn't hurt to tweak flow, lighting, etc based on what the algae type is telling you - dark & slimy, light & thin, blah blah blah.