Appreciating that it is impossible to represent every nuance of everyday life on the screen, what annoying things don't happen on screen that do happen IRL?
For me, it's not adjusting car seats. How is a 5'4" person suddenly able to hop in a car that's just been driven by someone of 6' 2" without spending several minutes moving up/down/forwards/backwards. etc.
Also (mainly American) no-one says goodbye at the end of a phone call and most family meals are comprised of mashed potato - does anyone eat a roastie or a Dauphinoise?!