You discover someone was too lazy to take things down and just painted around it.
Also, discover the lazy dusters were about as well.
You can't stack books neatly, no matter how hard you tried.
When moving out, you discover your kids favorite toys as they are constantly afraid of them being packed away.
You quickly realize you should purge more often.
You forget to make dinner....a lot. So, have to come up with quick meals like egg salad.
You start seeing stacks of stuff everywhere.