Now I know that when you cough up or blow out clear phlegm it's a good thing, means no infection and you're healthy. But I have to say, I feel better if I hack up something interesting that's more yellow or green. Because then it makes the cough, or blowing my nose, feel so much more productive. I mean sometimes I'm doing it so often that it seems futile if the stuff is clear, but it's more interesting if I have some colors to see.
Well, green is my favorite color. :)