My answer hasn't changed since I began asking this question years ago.
And now is the perfect opportunity for my annual plug of the most underrated bop from the most underrated girl group
I would always choose BESTie. I have a true Midas Touch when it comes to my favorite nugu girl groups skyrocketing into superstardom (EXID and Mamamoo being easy examples), but my powers finally failed me with BESTie
They had visuals. They had vocals and the best main vocalist of any girl group possibly ever (Uji). They had great songs. They had fun, quirky personalities. They had it all!
I wish I could've seen them rise to the top, but everything faded away with little explanation after they released their last title track as a group
The fact they never hit it big keeps me up at night