who needs reading a css file when you can inspect the rules in firebug and such, handpick them and even edit live? I can't remember when I opened one's css file from source.
If you're not checking their respective boxes in the inspector, you can miss certain states and pseudo selectors. I also try to add .less and .sass/.scss to the end of stylesheets just to see if the working file is on the server too, since it can be easier to read.