I personally would not live with a stranger if it was avoidable. Living with anyone, whether or not I know them well or not can be harrowing at times just because alone time is so important to me. A person being a stranger would add an additional layer on top of that though.
When I think about moving in with a stranger, I see it from two angles. The first is the SA angle. For that, I look at my time sharing a dorm room at college. The summer leading up to that, I was so very worried and worked up thinking about being in such close quarters with someone else, and how terribly it would go and how incapable I was in dealing with it. I just couldn't see it going well. Once I got there, the end result ended up being very anticlimactic. I minded my business, he minded his business, and nothing interesting happened. It was very uneventful, boring, and forgettable.
The other angle is from a more generic perspective, you know what it's like for anyone to live with a stranger. Outside of college dorms I've actually never done it, but from what I know of others it's similar to buying a used car. Sometimes you get lucky and everything runs great, and sometimes the car breaks down a week later and steals all your DVDs. In most cases you have to put a little work in at one point or another to make sure things run smoothly, and as long as you do that it works out. You'd have to be prepared for any of the options though, and be ready for whatever situation you end up in.