Rock Stars

Forget the X Factor or Australia's Got Talent.....the real rock stars are here in Wagga Wagga, NSW, Australia!!
Tonight I spent a bit of time with my good friend's rock band (my friend is the singer) as I wanted to listen to them and have a go at taking photos of the band in challenging conditions. It was indeed my first time of taking such photos and experimented with different settings including flash settings. I chose this particular shot because I love the expression of his face. What do you think of this photograph? Any advice on how to take good photos of rock shows would be appreciated.
Cheers fellow blippers!