i tore my rotator cuff when i was 20. had all the tests including iodine injection while in MRI so they could 3d image the damage to the joint...not sure whether it was price or what but i never had surgery. i learned to live around it and there is only 1 or 2 things that really upset it but i usually dont even notice it anymore. its about 98% optimal now
but my party trick is that i can dislocate the joint just by relaxing and letting it hang down at the right angle.