We are on teh Cars and Cars 2 train at my house as well...
So when I cant watch, I work on trying to get more and more footage collected......for me as well as it gives another place where these videos are safe for years to come should something happen to others (fires / etc..) and some of it lost...I try to get everything I can and will continue to do so until I get to old to care...I am 35, so that is a LONG way away...
But for me, if I see something I dont have and one part of it interests me, I will work until I get all of it....