Wolf Spiders
There used to be a big 'un that lived in one of my student hovels, about the size of a human hand. At night, I could hear him scurring about in the dark catching and dismembering cockroaches. We stayed out of each others's way; but we got used to each other's presence, and he loved to watch me when I shaved in the mornings, on the bathroom wall, calmly grooming his fangs.