This was my first attempt at concert photograpghy. The venue was a 139 year old bar/restaurant with terrible lighting. I have been to about 500 live music performances and this place was one of the darkest I had ever been to. It was very small and I was in the front row. My lenses were a little too long to be as close as I was (I could rest my feet on the stage) but since this was my first try I did not worry about it too much. All photos were at iso1600. Please provide me with some critique and remember it's my first time so go easy. 
1.) Billy Nershi (from string cheese incident)
50mm, f/1.4, 1/50s, iso1600, spot metering on the face, focus on the face
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2.) Jillian Nershi (Billy's wife)
50mm, f/1.4, 1/50s, iso1600, spot metering on the face, focus on the face
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3.) Scott Law
50mm, f/1.4, 1/30s, iso1600, spot metering on the face, focused on guitar (in error)
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Those are the criteria I use in evaluating a photograph, and how I'll improve it. So as others have stated, I like how your photos are composed. IMO, the thing that needs the most improvement is color balance. I went ahead and edited the 1st picture.....I reduced the amount of red and bumped up some of the green and blue. I also slightly adjusted saturation and contrast. Saturation and contrast is always a preference: I notice the "in" thing right now is to really bump up contrast and saturation.
