Thank You BlissWorld for starting this thread and sorting all the info into a spreadsheet. I think this is going to be very helpful to everyone. I think the aircraft type is a great add because I try to take that into account before booking a flight, but I have received some rather surprising and unexpected upgrades on 733's, 735's and 73G's. I mainly try to book on the 752's, 76X's, and 753's, but usually end up on a 738 due to last minute change or swap from irr ops.