I just noticed that my bias are either leaders or rappers, which some happen to be the main dancers. :O Does this have any meaning? 

See:

SHINee's Onew (leader)

EXO's Suho (leader)

BigBang's GD (leader)

Teen Top's L.Joe (Rapper)

f(x)'s Amber (rapper)

SNSD 's Taeyeon (leader)

Sistar's Bora (rapper & Main dancer)

4Minute's Hyunah (rapper & main dancer)

Infinite's Hoya (rapper & main dancer)

NU'EST's JR (leader, rapper & main dancer)

B1A4's Jinyoung (leader)

Block B's Zico / B-Bomb (leader, rapper) (B-Bomb is the main dancer - I think)

(...) and that's it for what I remember.