I mean I'm the sort that likes these random habits use it for story, like maybe they needed water because they were nervous sometimes my mouth gets a little dry when I'm nervous ha. Then there are other things like I have a house where my teen likes to make popcorn but when she's hungry she won't eat that she eats what her father makes in fact no one eats popcorn I like to listen to the radio and usually they all choose to dance together I think it's sweet.
Though for restaurants when you want them sit still sometimes just turning off free will and keeping the conversation going at the table stops sims from getting up at all.