I'm always looking forward to a slew of new games, and there always seems to be something coming out that I really want to play. That means I sometimes stop playing a game in favor of a new one. Not because it's no good, or because I've lost interest, but because I love to check out something new. Add the fact that my brother is as big a gamer as I am, and we've got a whole lot of games between the two of us. We're always recommending games for each other, and he's yet to play some stellar games that I've got (like Red Dead Redemption and Mass Effect 3) and vice versa. The backloggery has helped us to create an overview of what we've got, and makes it easy for us to keep track of our progress, and there's all kinds of stats and info as well that many of us gamers like to keep track of.
So if you've got some unfinished games lying around, have a look at www.backloggery.com and get crackin' on finishing that backlog!