Guess
WELL, I pick Shuu because I will never be satisfied if I can't use Shuu.
Even though that would mean I couldn't use my own voice banks, every time I'd cover anything I'd just be thinking, "I could've used Shuu instead," (wHich is what I already think when I use my Utau RIP)
So yeah, Shuu is just imperative to my contentedness as an UTAU user
Although I guess that also means I couldn't use his falsetto since that comes as a separate addition from his regular bank but I don't care because it's Shuu lel