Hi. I'm DM, and I too have this problem. I bought Arkham Knight on the last PSN sale, but I still haven't finished Arkham Asylum. I now avoid RPGs, even though they used to be my favourite genre, because I know I will never finish them (although for some unknown reason I bought Witcher 3 anyway). I haven't finished any of the games on my Wii U, but I will probably buy the new Zelda anyway. I have a backlog to my backlog.
However, one day, when my kids are all grown up, and I am retired, I will be able to power on my PS3, and finally finish what I have started... Unless of course, I am still trying to catch Pokemon #1047 on Pokemon GO 2040.