I don't think I want my collection to get to the point where I don't even know what I have or not. That means I'm not playing what I buy which sort of negates the purpose of the hobby for me. Hopefully you got your money back though.
While I do have quite a backlog everything I have I do intend to play.
The problem is I only recently started buying current gen games.
I know the old school stuff I have because I had to hunt and search for deals/availability.
My current gen rules are simply "when it hits $20".
Xbox One and 3DS has the lions share of my attention right now so my WiiU and PS4 backlog is quite large.
Now that I've finished Bravely Second I just need to finish Alan Wake. Then maybe... Just maybe, I'll give the PS4 my attention.