I'm 6'4" and when flying in coach, I will usually select an exit row (especially on A330 or 764) over a comfort + seat. Legroom is more important to me than a free beer or anything else, and nothing beats 4' of leegroom at an exit door. I'm probably inadvertantly also helping DL's bottom line because I'm giving up a C+ seat (which I would get for free), allowing DL to sell it to somebody else.