Tamara:
how close people stand when they are speaking with you, especially men!
It took me a while to realize that :)
I read somewhere where they suggested that this stems from Poles, for the last 200 (+/-) years either couldn't talk in their own language or they couldn't talk openly. Hence the the coziness uncomfortable to many from other countries.
As for the lines in stores, I dunno, perhaps it might be explained using somewhat similar background. If you have to line up for hours to get that piece of meat you don't want anyone to sneak in front of you. Realities changed, the habits will likely change with time.