No real affection here from a Engineer, I've worked on -100, -200 and the 3,4 and 5s. Not the NGs though.
Anyone who has been involved with Flap rigging a 737 knows what a time consuming rigmarole that is
........... and don't start me on the door rigging ! ( especially D1L)
Plenty of sticky out bits low to the ground to hit your head on. Everything in the u/c bay covered in dirty crap...Windscreeen change which involves dismantling the cockpit.Fuel tanks that only a midget can access......
Only redeeming feature is that an Engine change is pretty easy.