This is not straightforward for me
A tier:
I love NJ and like RV. I could elaborate further but I simply enjoy both groups
B tier:
I enjoy LSRF a lot as performers and their discography is good, I think the group lack of strong musical identity and lacking of vocal skills are preventing me to jump in them for good
Mamamoo is amazing live and have good songs, I think they comes next. However they subtle change in music direction post the 4 seasons project was a turn off for me which decreased them from A to B tier
C tier:
Neutral towards Gfriend. They are talented and gave many good songs but their career is largely redundant
G Idle is... alright I guess? They used to be much better. I appreciate their efforts to be different than other groups both musically and conceptually and the fact they are self produced surely deserves praise but otherwise same opinion of GFriend, talented group I simply don't care for
D tier:
Aespa discography is one of the worst among Big 4 girlies. IVE is just basic and boring. They are in the bottom of the list. But so are Twice and Blackpink. I will still choose BP and Twice over Aespa and IVE. Those groups are iconic at least, can't say the same about IVE and Aespa
In all I will choose the 3rd gen, simply because I can't think anything positive on Aespa and IVE to choose over TWICE and Blackpink