Games like FTL, The Curious Expedition, Rocket League, Papers Please, Super Hexagon, Crypt of the Necrodancer, Chaos Reborn, Keep Talking and Nobody Explodes... bring back the originality and the pure, unadulterated fun that we had gaming in the late 80s and early 90s, which had been mostly lost in the late 90s and in the full 00s decade, where everything seemed to be franchises and iteration on old formats.
Of course if you look at AAA games it's still mostly rehashes, grindfests and simplified remakes of classics, but I'd argue you're looking at the wrong place.
The only company that so far repeated the Bioware/Id story is CD Project RED - although I do have high hopes for Croteam, Klei and Flying Wild Hog making it big too.
An ecosystem in which we have only rough diamonds and polished turds is not healthy. I hope that we will get more polished gems soon.
Basically after the Amiga died and before the Xbox360 came out (I would say off the top of my hat).
We are in a bad valley right now. Modding is getting progressively harder - compare the fan made content for BGII vs MASS EFFECT. Local servers to play multiplayer too - we had them back in doom and starcraft, so there is no excuse from excluding them from new doom and starcraft II. Save at anytime is long past gone - everything is checkpoints, or in the case of XCOM - even if allowed not "real".
There was more to PC gaming than 4K PC master race superiority (guilty of being proud member of said race myself).
Back in the day - you played the game, the ways you liked. Right now you play the game, the ways the developers like in the majority of big games - that is the console way.