He made a technical decision not a decision based on his feeling he said both teams were established and had good vocalists and if we know the other singers all of them sing high pitch notes, which is Taemin's strong suit, if he goes to those teams he is not going to shine because they had those notes there, in this team they sing at a lower registry so he can do those high notes he does. Good Taemin, that tell us, our Taemin is a grown up and great at making career decisions
He is so sweet and gentle and full of emotion, and yet when he talks about making decisions Taemin is very strategic. Part of the reason for his success.
Taemin's didn't pick KJK x UV x Hwang Chi Yeol's team but during his 2nd collab there, they made a rule that you can pick anyone from other team to collab. Taemin and UV picked each other, so thankful for that opportunity