I like custom shooters as long as they have a nice feel to them. Basically they should be round and disk shaped like the OEM and not shaped like a Storm Trooper head, Joker head, Raptor claw or something like that. I don't even like the ball shaped ones because of the feel.
I really like the ones from Super Skill Shot. They are done so smooth and perfectly shaped on the backside that they feel great and help to be more consistent on hitting skill shots. To me this is the perfect shape and also cool design: