Interesting thread! Here I go;
Kimura from Azumanga Daioh and Kururu from Keroro Gunsou are the first two that come to mind. Anyone who has read/seen both of these series will know the link between those two characters. 😛
On a serious level;
Ginko from Mushishi. I'm down-to-earth, calm and collected at all times, if a little lazy, a wanderer and I'm often neutral about things.
Suzuki from Tekkonkinkreet. I'm usually only concerned for my well-being, I'm uneasy about things that change around me, a very nostalgic person.
Number 9 from No. 5, because I can be crazily dedicated to particular things, and I like to immerse others in them from time to time. I can also be quite reserved.