I kinda think I need to find other ways to relieve tension. There are plenty of habit forming ways, and/or self-destructive.
Headbanging, as I've found, can be destructive.
It did help when I've done it before, but it depends on the stress level.
I think I pulled every muscle in my neck and upper back within an hour.
So, just a warning for any fellow headbangers, don't over-do it. It's been three days and I still can't fully move my neck.