Tie between 6th generation (PS2/GC/Xbox) and the 8th generation (PS4/Xbox One/Switch)
6th gen...Good god almighty, the creativity was endless, so much variety, and 95% of it was quality. Just pure emphasis on fun and immersion from every genre, I can't think of a single game I bought back then that I didn't enjoy. Even shit games like licensed crap had a charm to them. As a kid these games felt boundless, and as an adult when I replay them, or play some classics I missed out on, they still have a feel to them that just isn't present today.
8th gen, look I know it's easy to be cynical with shit like fortnite and endless COD sequels and on the surface it seems like there is less variety and in some ways there is, but good god almighty, I still love so many games. AC Origins/Odyssey, Red Dead 2 (and I personally love Red dead online), the Titanfall games, basically every Sony first party title. You say trends, but fuck it I like the cinematic third person action game trend. FF7 Remake is my dream game and it exists, and is everything I dreamed it would be. And indie games like a hat in time and bug fables did a fantastic job filling in the missing gaps. Crash 4 is a thing and it's awesome. Consoles might have been underpowered but go back to PS3/360 for a day, they all ran at like 15fps unless it was an arcade racer or first party title. PS4/Xbox One were more consistent despite the restraints. Not to mention massive QOL improvements this gen like more accessibility options, more seamless online integration, and easier data backup options. And I haven't even mentioned Nintendo's STELLER output.