marshalers
I used to work on a ramp with a mix of corporate jets and light a/c, tightly spaced at that.
IMHO, I see a lot of marshalers at big US airports who don't seem to be taking their job as seriously as I would expect. I'm sure most of the guys are professional enough, its not my intent to slander a group here. It seems to me though there are a few too many people joking amongst each other, paying more attention to where the a/c was than where its going etc. Take a few days to watch these things and see what you think, maybe its just me, I don't know.