Yes, case freak here.
Have the defender, which I really like except for the bulkiness, otherwise it is perfect for me. I do have a need for the belt clip too which is nice and included.
I also have the lifeproof which is awesome except the screen protector does not function as well as the defender's in terms of touch sensitivity, though I think I have a slightly older version and the screen protector is slightly lifted on the top and bottom due to the foam underneath. I wish it came with a belt clip for the price !
I also have the poetic atmosphere which is really nice and slim and perfect for those that don't need a high level of drop protection. Only 1 minor gripe- the bottom TPU portion is slightly loose.