The thing is this. I had a great evening because I enjoyed the journey - the traffic was bad, but the in-car music was brilliant. I had a great evening because I enjoyed the wandering round one of my favourite cities in the lead-in to one of my favourite events there. I had a great evening because I met some great people. And I had a great evening because, and I'm frightened to say this, I think the gig actually went quite well.
So, let's assume that the next gig will be shocking! D'oh! Effing yin and yang!