I use my own server side analytics code. The reason I do, is that, no matter how much people pump Google Analytics, I'm afraid of it. I've been to too many sites that were completely hung, and in the status bar, my browser is saying "waiting for www.google-analytics.com".

I usually hit refresh and it generally works, but how many people don't? This isn't something that's happened to me once or twice. It happens often enough that I'm consciously avoiding ga. I don't need to cause more people to bounce for no reason.