The worst code I have seen is either by the people who are so arrogant that they feel that nothing that they can do is wrong or simply don't care. I am never satisfied with my own code but sometimes achieve pride in my own work that the pragmatist in me allows. Too much satisfaction leads to complacency.

I have yet to be satisfied with an OS, application or utility. That is not to say that I haven't been impressed but that I feel that there has always been room for improvement.