That's one of my problems is that there are so many songs to sing that I sort of get indecisive about what I want to do in a show - because there are so many possibilities! There are so many great songs out there.
A lot of my albums that I've done, a lot of the songs have been the first take. It's before you mess with it too much - you can take away all the spontaneity and the emotion of something by trying to make it sound perfect.