My favourite time a as PC gamer was 2002 to 2004 but I would say the PC games market is a in decent state at the moment. There's a lot of variety and good quality titles out there provided you ignore the the headline grabbing titles of doom (LOTR: Gollum, Starfield, TLOU Part 1, Cities Skylines 2 and Forspoken). The biggest change in PC gaming compared to early 2000's is people tend to play the same titles for a lot longer I meant just look at the Steam results to see what people are playing and about 1/2 the 10 top has had the same titles in it for years now. Steam has been a big help in giving Indie developers a platform to showcase their titles, frankly are spoilt for choice compared to our console cousins.
The drawbacks of modern gaming should be obvious (content striped from the base game and repacked as DLC), loot boxes and micro transactions etc all leave a bad taste in mouth. Mostly that's the fault of large publishers who can get away with treating their customers like crap but Indie developers are no angels either (numerous KickStarter campaigns that are little more then a cash grab).
The one thing I do miss now compared to 20 years ago are RTS games which seem to have gone the way of the Click & Point titles. Not sure why the interest in those sort of titles has waned over the years, I would love to see a modern take on Command & Conquer Generals (preferably with none of EA's usual 8ull8hit).