I have the exact same problem.
Slowly coming to grips with that the difference between being a kid and being an adult is that you now instead of having practically unlimited time to play this one game, as an adult you will always be more excited and hyped about the actual prospect of buying and playing a game, than playing it...
Because now you need to balance it out against many responsibilities and other interests.
The issue is that there is so much great content in so many different genres in books, games and movies (and tv shows..) that accepting that unless you're totally ok with letting your life crumble.. you can't enjoy even most of the great content.
I don't think this year I finished any game from start to finish. This was unthinkable when I didn't have real responsibilities.
As we make more money, we have access to all the games and entertainment we want.. but no time to play them. I have so many great games and started many only for the start (like recently Destiny 2, The Last of Us (!)) but actually only MGS V is getting some burn.
Witcher 3, Horizon, Uncharted 4, Borderlands 2, the last Halo on X1.. so many games won't even get closed to getting played. Could make a list of 50 new games that haven't even been opened.
Does this make sense? (More of a rhetorical question at this point)
What
@Blondie said makes sense somehow: 'we are game collectors not really gamers' (at least not non-stop gamers)