Yeah man, Metal all the way
Over the last 2 Years, I've grown my hair and I have to say I like how it turned out. It may not be super crisp, but THAT'S YOUR STYLE!
You're thinking of changing your style, because you don't like your current one. So did I. This is now my style. People like it - most do. Very often, you even get more interesting (because you do your own thing). A few girls will be appalled, because, well, they don't like it.
That's okay. You polarize. It's a good thing. There will always be haters. But they all kind of respect me for doing my thing.
You will see if the long hair really looks good on you - and it definitely can! If it does, yourself liking your style will do you much more good than having some pseudo-cool standard cut.
If you really want to do it, grow some balls. It's a RISK! Are you afraid? Yep, it may look weird for some time (up to a year). But the point is, you don't care how it looks. Also, what other people think. This would also go well with your rock/metal mentality.
This, in itself, is an attractive quality.
Is it nuts? Perhaps, but I don't regret it.
I won't cut my hair off, only because SoSuave said I MIGHT be getting more approaches... hell it's part of my identity!