I like the finger part, for easier removal, but does sometimes gets in the way of igniter insertion, igniter leads, and I do believe it'll have a slight sway on the motor exhaust. Also, the finger hook part can be used to hang your rockets from a string suspended between two walls. (I did this in one place I lived, so they wouldn't get lost on the floor, ran a string and hung them up by their hook!)
I like the standard because of the clean look and no interferences, but they can be a bit of a pain (literally - like them catching under your finger nail!) when removing motors..