I am not a major road warrior, but I do travel some for work....
Some airports are really bad.... Oakland for example is pretty bad. Not a good layout and hard to get in and out.
Kansas City old airport was probably great in the pre-9-11 days. But horrible now. But their new airport seems pretty nice. Especially when they finish demo of the old airport.
But yeah LAX is horrible. O'Hare is pretty bad. Reagan national is old.
But BWI isn't bad. I actually really liked a recent transfer in Austin....