Not necessarily, Cyn.
I thought that higher was better, too. But then I went from 90 to about 80 and I could see so much better. Of course, I couldn't see as much around me, but what I could see was much easier to aim at. It's a preference, just find what's good for you.
Oh and I also tend to set it higher for Sniper, because I don't like zooming too much.
EDIT: I've changed it to 90.