I'm pretty quiet, although I can also be quite sociable. I guess I'd say I like meaningful conversations more than small talk. Generally a good listener. When I've had stays with people a few times, the feedback I get is that I bring a sense of peace to the home, and that it's great to have me around. Hopefully that still holds true!
You will not find a person who is more respectful of your place and your stuff.
I like to keep things clean, but I don't need everything perfectly ordered. I'm grossed out by dirt and germs, but not so much by just messiness. i.e. please don't feel your place does not have to be spotless to have me stay there.