I’m with Ned, I usually have other things as my desktop background. Usually cityscapes, landscapes, various images of the night sky and hubble space telescope images. Currently I’ve got a rolling slideshow of various 90′s video games painted up like modern HD remake versions by an artist called ‘Orioto’
Mine was Jarno Trulli from pre-season testing, but I’ve recently changed it to a graph of my little brothers recent kart race of which he leads almost all of the laps, the first time he’s ever lead a lap of a championship race!
As the season goes on I usually pick a picture from here after every race and use that – currently it’s Alonso pointing to the Cavallino Rampante – but during the off season I have photos of older F1 seasons – usually Ferrari’s.