I used to use that approach... it failed. Your problem is "Star Citizen" and particularly "Guild Wars 2". MMO ruin gamers. The time you waste on basically a virtual someone else universe could be spent playing really good games that you will never play otherwise.
Well I happen to enjoy the combat model of gw2, especially pvp and wvw despite the many changes Anet have made over the last few years. I also strangely enjoy the lore, story/characters and game world - the environmental design is so good it often feels like I'm playing in a painting.
It is also the first "mmo" I have ever played, so I am not an mmo gamer by any stretch as it is.
Truth is I tend to gravitate long term to multiplayer games with gameplay I find fun - which is usually combat mechanics - hence having spent over 1000 hours in Mass Effect 3 multiplayer and even more than that in the various Jedi Knight multiplayers. You could call that wasted time but I call it fun memories. GW2, despite flaws has a fantastic combat model - and I'd rather spend an hour pugging pvp matches or roaming wvw than wasting it playing an hour of I dunno... Starcraft or something.
In fact the single biggest waste of time I do partially regret is actually the countless hours I spent testing and organinsing mods in order to play TES Oblivion. The only meaningful memory I can take from that is to never do it again - hence never playing Skyrim more than once. Modding skyrim is equally a total waste of time in my eyes because I don't enjoy the gameplay - it is almost simply a tech demo/interactive painting. Such a waste of time looking back...
I have played several of the big singleplayer titles over the recent years - eg DXHR, Disnonoured, Bioshock Infinite, Portal1/2, Borderlands, etc and have a few on my list still to play - Alien Isolation to name one. These I usually complete within a week or two then return to my usual current multiplayer game (which at this time happens to be gw2). I anticipate this to move to mass effect andromeda multiplayer once that is released next year.
However here is the thing - for all those big singleplayer titles, I have to like the theme/setting and the genre of the game to play it. For example a friend of mine recommended Fallout 3 years ago citing it to be the best game ever, although I had stayed away because I don't enjoy the post apocalyptic wasteland setting. And so I bought it on a steam sale, started to play and didn't enjoy it at all - it just bored me, so not only a waste of money but waste of time had I played it to the end.
Similarly I don't enjoy pure FPS (ie battlefield), RTS (in general although I did enjoy homeworld), and pretty much all indie games such as those usually featured on steam. I don't like some of the big franchises like Dragon Age, Assassin's Creed, GTA, Fallout, and so on. They just bore me, so why would I waste my time playing something I don't find fun.
In fact some of the few games I do regret not playing are console exclusives - ie Last of Us and soon Horizon zero dawn - one of the few downsides of only owning a PC.
I will be starting Witcher 3 once I have a holiday from work, because it's a lot of hours to play, and then probably pick up Dishonoured 2 on a steam sale in the future. Other than that I see no other current titles I'm interested in playing.
I always have a current multiplayer game and intersperse that with the occasional amazing singleplayer title - the trouble is these are very rare nowadays so I tend not to bother unless reading an exceptional review such as with Witcher 3.
