Most of the time I finish by CIP (in condom usually) while DFK or no DFK depending on the WL.
I find this the most satisfying and primal.
Other times it’s by COB, usually by pulling out and tearing the condom off in time.
When CIM is available at no extras, I may go for it, depending on how I feel but it’s never something I specifically seek.
How do you finish?