Bowing and waving?

friendship level I think, unless there's different animations for different personalities as well.
 
It's just a way to say goodbye. If they don't do anything then you didn't talk to them and didn't notice you were there or they are sick.
 
Normals and Lazies bow, and all other personalities wave, regardless of what friendship level you have

If you didn't speak to them, or they're ill, they don't do anything
 
They also don't react if you talked to them too much and they are "deep in thought" (aka not willing to have a conversation with you anymore).
 
A bow could be considered more respectful. But it'll only say something about their personality.
I also bow or wave back when they do. :rolleyes:
 
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