Very sad to see the 757 winding down, though not as sad I guess as the final demise of Concorde- a truly magnificent machine. At least the 757 will be around for many years yet.
In my 19,000+ hours I've flown Boeings, Scarebuses and Douglas, with three airlines.
The Boeing is the Mercedes or BMW or Rolls Royce of aircraft, the McDouglas is the Ford, and the Bus is the .... cheap and light. I've seen the worst and most threatening problems on Airbus- way way more than the other two. (Our engineering people tell me they're actually very expensive on parts, just as they have told me about design compromises that Boeing simply would not make...)
Boeing wins hands down on quality, and by a substantial margain.
(No I'm not American- not even a little bit.)