The insides of them look reassuringly nice too.
Soft and cuddly.
Might sound weird to some people but the first thing I did with my iPod Touch is chuck it about it bit. Its got a small scratch on the back because of it.
Now I'll use it.
I hate worrying about stuff so I never use any covers or cases for anything.
My iPods get scratched, iBook is wrecked, etc. I don't care. I don't buy things to sell on and can't be bothered with the hassle of taking things out of cases all the time.