I've searched through the forum and have come to the conclusion that a minimum total angle for walls and/or ceiling is 12 degrees. What I'm wondering is, on walls and a ceiling, does more angle help or hurt? I mean, would it be better to use say, 10 on one wall and 10 on the other making it 20? Or would it be the same? or worse? I guess the reason the question came up is I keep reading about the MINIMUM angle, and I guess I like the idea of headroom.<not literally>.

Does that also apply to monitors? I read to set them at either 60 or 90, does this mean that 75 will not work as well? Or simple no less, no more.
Save me if I sound silly,
Space