FWIW, I had to go to SAV airport to book a flight SAV-ATL-SFO because of using an AMEX companion deal. (Yeah, I saved a couple hundred bucks.) I told the agent that I'd appreciate bulkhead or exit row seats on the ATL-SFO (long haul) flights since I'm well over six feet tall. She booked us in exit rows on ALL flights. I may do this for all future trips.