Good point about aircraft types.
TU-154s we used to get were notorious for height changes during the turnaround, often the team would have to readjust the steps or airbridge a few times due to the huge height differences when fully loaded vs empty.
We have recently had problems with Boeing 737-300's and their pitot heads when using airbridges. Depending on the type of airbridge, you'd only have 1-2 inches of tolerance left or right, if you didn't get it spot on you risked hitting the pitot head, or not being close enough to the pitot head and the door subsequently getting stuck against the airbridge.