What people use the most, IK or FK?

[Bluedul]

just that

[Zappy]

Originally posted by Bluedul:

What people use the most, IK or FK?

Whichever is most appropriate for the current situation. IK rigs are good if you want to "position the hands/feet" (keeping a hand in place on a table or doorknob while the upper body moves), while FK rigs are good if you want to "swing the arms/legs" (rotating the shoulder, upper arm, forearm, and hand manually with fine control).

In fact, sometimes it's even helpful to have FK arms and IK feet, or have an IK right hand and a FK left arm - maybe even switching between FK and IK legs/feet multiple times depending on whether the foot is currently on the ground while walking, though it might be more effort than it's worth to cleanly swap between FK/IK multiple times.

TL;DR: FK and IK rigs suit different situations.