So I suddenly became addicted to this. Be warned you will either completely hate this or fall under its spell. I don't think there is anything in between.
Here are some of my favorites of the ones I found
Darker Than Black Mononoke Yuki Nagato Hikaru no Go Code Geass Terra e Simon and SpiralNia! Kino no Tabi Chi's Sweet Home Rika and Satoko Note only the last 3 are youtube links. The rest are niconico video links. You need to register to see them.
If this isn't enough for you just search for CaramellDansen ウッーウッーウマウマ(゚∀゚) on niconico and youtube. XD
Many anime character may have been harmed during the making of these videos
Oh yeah and Medicine Seller for Saigar tonight Please!