I have been a long-time (obsessed) fan of Geoff McFetridge -- admiring his witty use of color and shape. He simplifies everything to a point that you think it's easy, which only underlines what a skillful artist he is. On a whim, one day as I was staring at a blank wall in my house, I thought "I will buy something of his!". All roads led to dead (or expensive) ends. If you find yourself itching to unload your own piece, or have an extra bundle of $100 bills taking up space, donations are welcome.
P.S. There's a pretty good interview with him over on Designboom worth checking out.