I know what I look like. But I am a conceited fellow. I do quick reality checks in a mirror now and then to make sure everything is still okay. I should think that I am pretty much just like everybody else in that regard.
http://cssstats.com/ is a wonderful tool to let your stylesheets have a quick look in the mirror. We know what our stylesheets look like. After all, we wrote them. But as we keep making changes to a website and update the CSS to reflect those changes the original file inevitably grows.