Personally, if I were in your situation I would get the coupe. Much for sport looking for an 18 year old. It will be a little more crowded with friends than a sedan but if your by yourself 90% of the time who cares... besides, if your friends are squished in the back seat they can drive their own cars, haha just kidding! A sedan strikes me as more of a family car, so unless you plan on starting a family sometime in the next few years go with the coupe!