This is a very badly worded title, lol.
The ol' debate about 'doing something with your life' versus doing xyz pass-time is an endlessly amusing one. You'll most likely find that people who get addicted to xyz activity are people who have already come to the conclusion that they're not going to be either Donald Trump or Poll Pot anyway and are merely people who then, and only then, 'resign' themselves to another (pointless?) activity.
Someone who lives, eats and sleeps a sport (but doesn't get paid for it) is no different to someone who lives, eats and sleeps a sporting computer game(s) - the only difference being that one is (potentially) more socially active and therefore automatically attains easier social acceptability instead of auto-no-lifer comments.
The vast majority of people in life (like 99%) do fuck all in their spare time, but it seems 99% of people have such a rigid and definite idea on what's a 'correct' type of fuck all! Which then changes depending on whosever's money's going to whichever's politician's debating sheet.
On the topic of the thread, yes, I've had that sensation with games before. It's like the feeling you get coming back from a great holiday or an utterly unforgettable 3 day party. It's like, my god, how could that end? Why does that have to end? What is this sudden brick wall of a return to routine that seems suddenly empty? Like coming down from a drug I suppose, the stark difference between a game which took you to the moon at the exact right point in the game and suddenly looking at a desktop game of Solitaire…
I tend to get that upon completing every game I genuinely enjoy. The extent to which it lasts depends on how many games I have ready to play next combined with the amount of free-time that exists upon completing said near-masterpiece. Can be a few minutes, can be a few hours.
Name a game? The last time it happened noticeably was probably when I completed Broken Sword 2 a week or two back. The last time it happened as the result of an epic game that was totally new to me? Probably King's Bounty: The Legend or Dragon Age: Awakenings (I was quite ready for NWN2 to end by the time it ended, lol).