Why? Because I just stick it on my head. Doesn't really matter. I don't wear it like a wigger, if that's what you're thinking. (not like it matters what you think, but just so there's no confusion...)
Baseball hats I wear front right about 99% of the time and back 1%, such as if i'm on a fast rollercoaster and aerodynamically it only makes sense to wear it back. Brimmed beanies the brim must be back, it just looks retarded if you wear it front.