They're really just looking for criminal activity, potential foreign ties, or anything that could compromise you (e.g. major debt, gambling problems, drinking, etc.). At 17, anything that happened more than 10 years ago probably won't be an issue. If you want fun, wait to do it again in 10 years and put in all the addresses and people who knew you after moving every couple years, and all the people have to be different, so if you changed apartments at your first command, that's two address and two different people.