I think this is actually an interesting question. I think I've been leaving on the default desktop on any computer I use, for over a decade now. It's not just that, it's every kind of setting. I just don't futz around with things that don't actively get in the way of my work anymore. I used to love to tweak everything, to try to pour my personality into a sweet computer setup, but after using computers for fifteen years or so, I just lost interest in that.