May was a month of interviews for me. I was in charge of hiring two summer interns for our department, and I needed to find a new roommate. Along the way, I realized that finding a roommate, interviewing a possible hire, or even going on a first date are pretty much the same. The main question you seek to answer is "Are you a crazy person?" After you've figured that out, you want to know "Are you a good match for this situation?" and "Are you interested?".
I have a good track record with roommate selection so far. Since I prefer short-term roommates, I'm already on the fourth since I bought the house. I have a finely crafted ad, a set of questions that I ask during the meeting, and a set of expectations that I share with them. Then there's the application and credit check, which are just enough hassle that the not-seriously-interested don't continue. I seem to do a good job of conveying what living with me is like, and finding people who will like my house and me (i.e. they will not mind I don't talk to them a great deal), because everyone involved has seemed pretty happy.
Tomorrow the interns start and my newest roommate moves in, and I can find out if my selection processes were successful again.