Hellooo!
I checked out your C&C link so I thought I'd give it a go ...
#1 could benefit from shifting the figure up in the frame, using one of the non-central AF points to keep focus but also shift the framing - not easy in low light, sometimes the auxiliary AF points don't want to play ball, I grant you but I do think he should be full frame rather than topped with negative space. (I'm not under any illusions that you don't know how to do this, by the way, I'm sure you're quite capable, just suggesting it.) Other than that, strong image - good expression, pose and light.
#2 I can't find fault with ...
#3 should be shifted right just a small amount, there is space around the background figure where the bassist/singer (and primary subject) has his leg clipped.
#4 I like the idea of and still think the image is okay but could use a bit more clarity in at least a certain area. The goggles are nearly there but, just need a bit more ...
#5 I really like, the expression you've captured (especially in his eye) is brilliant. Best of the set for my (hypothetical) money.
#6 doesn't do it for me but apart from the tiny clip of his arm there isn't anything really wrong with it that I can put my finger on, certainly not a bad image and the expression captured is again very strong.
#7 is very good, quite creative use of the smoke and light effects with enough interest in the performer's visible features - works well with his appearance too.
#8 I'm not sure on the expression but then, imagining other expressions in its place, not sure I dislike it either.
Please post your thoughts on my thoughts ...
Yours, on my own private Three Mile Island,
Owain.
P.S. Great Images! 