The main one for me is ankle pain. I had crushed (yes, crushed) the talus and after two surgeries to try and repair it, I'm left with little cartilage left. I get a shot in the joint twice a year that helps quite a bit with mobility, but I still get pain on pretty much a daily basis. Basically, I can't plie on one side.

And then there's the on going neuroma on one foot.
The back pain from the two car accidents.
The tendonitis in my bad ankle.