as far as driving goes, probably people that move into your lane because the guy in front of them in their lane was going too slow, but then they go just as slow after moving into your lane.
in the airport it's really annoying when people block the entire escalator instead of staying off to one side. like when your inbound flight is late coming into gate A2 in ATL and you're trying to run up the steps to catch your connection in D38 and bam you get blocked because some prick(s) decided to sit his roll aboard down next to him on the escalator instead of behind him. its just simple common sense, common courtesy and yet mostly nonexistent in our airports.
about crewrooms - all the incessant hearsay-spreading and endless speculating about possible base closures/base openings/upgrades/the future and direction of the company/etc etc. it's like, whatever's going to happen is going to happen and there's not a thing we can do about it, so WHO CARES?!!!