One thing I really like about the 757 is that if you got the F upgrade (and the chances are better with the big section) then you board through the middle of the plane and you don't have all the other passengers running through the F section to get to coach. Also I wonder how many B/Y/M instant upgrade fares will be available on the transcons when they fly the 737 instead of the 757....

I also like the bathroom just behind the F section although the long 737 should have that as well (at least the AS flight I took on the same equipment had it).