Laziness is a virtue when it enables you to do in 20 lines of code what a diligent programmer takes 200 (or 2000) to do. Impatience is a virtue when it drives you to produce a compiler that does in 30 seconds what the patient programmer waits 30 minutes for. Hubris is a virtue when you're someone like Linus Torvalds, with a vision of something that most would consider insane to tackle.