Interesting question[s]. I certainly find I have different behaviours when flying l/h.

I like puddings [of unknown origin] but rarely eat them in-flight ... usually go for the cheese plate.
I normally drink wine ... why do I tend to have Vodka & Tonic, which I never drink on the ground?

I think my normal inter-personal behaviour remains essentially unchanged. Indeed, perhaps I'm even friendlier to ground and in-flight staff than I would be with similar people in the non-flying environment. Perhaps it's just the "holiday mood" kicking in?