While I love DEN and then SFO the most, IAD is not quite as bad as LAX. I'd rate ORD worse then LAX since ORD does not have AC power, but ORD at least is more light and airy. I mean here in SEA the N terminal is nothing to take snapshots of, since it also is dark like IAD and LAX, but at least we have internet and a cental meal area (and a UGS Room!).
It is too bad that SEA, in remodeling the main terminal, doesn't plan to do anything to the North or South terminals, I believe. But at least the food court is open at 5am now! ^ ^ ^