Broke mine a couple of years ago in a motorcycle race. Sloppy lowside and my shoulder took the brunt. Felt it pop twice and then my head hit. Two fractures with the piece in the middle a nice parallelogram that turned sideways.
Surgery 3 days after the crash for a plate. The worst part about the plate was that it's so close to the surface that the skin above the screw heads and over the edges was extremely sensitive. Took about 18 months for it to feel 'normal.' The second worst part was that the surgeon cut the nerve that transmits sensations from the skin over my right pectoral muscle. It still feels like I have a cobweb that's being dragged over the area whenever something touches it. It's better now, but still noticeable.
Six months post opp the doc had to go in and clean out the AC joint. The wreck aggravated a previous unknown injury and all but locked up the joint.