I disagree. The 737 is an ancient design which has been limped along for far too long by Boeing. The cabin is small, the plane is noisy, and the 800s and 900s are too large to effectively board as deplane through L1. When seated up front, there's a constant 30 minutes of someone's rear end in your face during boarding. Give me a 757 any time over a 737. I even find the A320 series to be preferable to the 737s, if only they could get the A321 to be able to board via L2...