Game over?

Any game and if in addition it is good, it unfortunately ends sooner or later. Bad usually runs much faster, often even before they even really begin.
What I? Yes, simply because in my game menu full of games, good games (at least in my view) that I have not passed through. And I suspect that I am not alone.
Why? Can't say that bothered. From time to time returned to him or think will come back and still play, maybe...
It lasts for quite a long time, 7-8 years for sure, and maybe more, and most likely many of them will not be completed until the final credits (where there is much to write about NG+)
I guess about why it happens and might be able to write about it...Maybe later.
To start I would like to know your opinion, gentlemen gamers.

How many games (good from your point of view) that you initiated but never completed to the end?
What and why?
Do you believe that when it will be able to finish all my unfinished games, or at least some of them?