Yeah, I buy way to many games than I can actually play as well. It is stupid as can be, and I am going to try and be smart with it this year, for sure. I still have a back log of titles to play that will easily get me through the first 2 months of next year, if not longer.
As far as the issue, I too have a ton of games on the PC I have hardly touched. My main reason for it is I sit in front of a computer all day at work. I really just do not feel like sitting in front of one when I get home any more. I actually have to admit to myself these days I actually prefer console gaming. For nothing else than the fact I can sit on my couch. I know PC gaming is superior, i actually just upgraded my graphics card a few months back, and if given the choice, I will always choose the PC as the preferred platform to play on, I just do not play on it that much at all these days.
Its a combination of getting older and also as I said, not wanting to sit in front of a computer after doing so all day for work. I guess this is what getting old is all about, sacrificing those things you prefer to kill time on on the things you actually have to kill time on. Oh well I guess.