Thanks, these were taken before I installed the S type screen so focus was hit or miss. Mostly miss haha. Thankfully there's Ch to help out. The reason for the mix of color and b/w is stage lighting. Sometimes it looks cool, sometimes it blows stuff out in a very unflattering manner. And other times the colors just make the shot look bad. In the second shot, red and green lights illuminated the background giving the musician a christmas styled halo, which didn't fit the mood haha.
As for the music, I can't think of a genre less robotic live. Only aggressive music has so much motion, intensity and raw emotion flowing near constantly. :-) Even when I don't care for the bands, they are very fun to shoot.