I'm an FO and my right arm freezes on the 737 when cold AC is needed.

But I have to say that the most annoying thing about "my" aircraft is that I am responsible for flying the 300, 500, 700, 800, 900, and 900er. Its not a total reinvention of the wheel between them all but the classics vs the NGs is is bit awkward after along time away from the other. And that we fly the NGs with analog displays.

Other than that I like the plane.