I need some help here. I'm self taught. I've found that I'm stuck in the "metallica box" . Every riff I seem to come up with is in this box and they all sound very similar. This is driving me nuts. I try to break away from it and I'm finding that I don't know where to go or what notes belong. I look at the neck and all I see are the same patterns. What are some scales/modes I can learn that will still sound rockish ? I've tried a few and they either sound like noise or they are too pretty.(not that there's anything wrong with that.. but I'll save it for later). I'm playing in a fairly heavy technical band right now and I'd like to come up with some stuff that doesn't sound like it's been done to death. Any suggestions would be helpful.