I used to be a clutter-addict just for that very same reason, wanted things to look more life like. I've since eased off of it because when you look at it, it actually can accumulate very quickly into ton's of custom content clutter. Christmas I had 2 homes so beautifully decorated with EVERYTHING only to have to take it down after the holiday's and remove. That is a bit TOO much life like for me, plus I hated having to take it all down because I was proud of it.
I think we all are a bit obsessive at times with custom content.
He just makes my belly button smilez!