Most of the musicians here seem to be guitarists and do rock or singer songwriter stuff. Do yourself a favor and listen to it. Many come here for techique tips etc., and you'll find some very "pro" sounding work done at home studios.
You'll find some "darker" or heavier stuff at my site listed below, MGH does speed/death metal, and there are plenty of others here that do "darker" music. You just have to dig some. I don't know if you can go back so far at the P5 forum, but that was more electronic music. And post some of your own when you get the count to post. You'll find that people that don't necessarily make your kind of music can apply their ears to yours, giving good tips.
@