I know thats it bad to play fast if your pick is like slicing the string, but is it bad to go outward at an angle a bit if it helps you go faster? Or is it best to be straight completely?
i hold it pretty much at 90 degrees from the string, my guitar teacher was baffled when he saw that
Well your guitar teacher was wrong. The pick is supposed to be held at as close to 90 degrees as possible.
90 going down, going back up i tend to angle it downwards
I hold it at about 45 degrees from the string.
i hold my pick around 85 - 90 Degrees depend if i'm tremolo picking or not.