> Every photograph and video you take at a concert or other live event will probably be terrible. Just enjoy the moments, don’t feel pressured to document them.
I would also add that while singing along at concerts certainly has its time and place, actually listening to the artist singing is better.
Also, I was fairly miffed when I went to a concert a while back and had the singer drowned out by five guys singing along really loudly right beside me. (We were quite far back from the stage.) It's great that they're having a good time, but they probably could have had just as good a time going to karaoke or something. Although you would lose the feeling of "being there".
Depends on the venue and the artist. There are some artists that I like to see live because they're good at creating high-energy environment, and the endorphin release I get from singing along is part of that high-energy environment. Other musical performances I attend based on my appreciation of the music and less the act. Generally speaking, if I don't have a seat, there's a good chance that I'm going to spend most of the set singing.