Their Just Sooo Cute! ^_^~
Of all the Nekomimi I have seen, my favorite will always be my sweet Aisha ClanClan from the "Outlaw Star" series.
I know she can be an annoying little sour puss, but that's what makes her cute. Her anger toward Gene causes her to do the silliest things. Like trying to activate her beast form on Blue Heaven with no moon. All that energy and she ends up begging for help just to get by.