What is your all time favorite Optimus transformation?

Mine's this one at the NEST base. It just always seemed very toy-like to me.

The arms popping out to the sides, the front wheels sliding back and chest windows dropping down a la leader toy. But then we actually see how the legs are formed and it's just the voyager with sleeper wrapping around the shins (btw, I would love if the new ss leader tries this method).

And the sound design is, as always, amazing with different clicks and whirring aligned with the music.