Hi JP,
Yeah if you have any Quaternion questions throw them Spikey’s way.
But here is a general run down on when to use what….(but this is personal preference)
-If a control only needs to move on 1 axis -it is much easier to use Euler.
-If a control rotates on all 3 axes, Quaterion is a better option. *however* sometimes it is easier to use Euler and deal with any gimbal lock on the spots where you encounter it (if at all)
And sometimes I am told to supply a rig in Euler XYZ by default. (in Blender you can change the rotation mode and even keyframe this, so it’s not that big of a deal). Although with this it best to use the same rotation mode for the entire shot.
I hope this helped and didn’t make more questions for you haha
