I only stanned 3 groups
2nd gen: Secret and Hello venus
3rd gen: Gfriend
I believe Gfriend was the one that I stanned longest and hardest, it also had to do with how I was way more familiar with Kpop-related topics such a charts, how to buy albums, how to promote them through social media etc.
Now I probably won't stan anyone else ever, I lost the sense of it.