My disabilities are mental, so there's not much for me to say here... although I have an RP character who is an amputee, and from that angle I have noticed how hard it is to find anything good.
He has a wooden pirate peg leg. :matte-motes-impatient: For his RP setting that's fine although I imagine that people who want their SL selves to reflect their RL selves' disabilities they might want a more modern prosthetic. Unless you're into pirates.
I also want a natural limping walk for him, but all the limping walks/runs I can find suggest current acute injury rather than longterm permanent disability.
I want to learn to animate so I can do this stuff. One thing I want to do, if nobody's done it yet, is make a wheelchair or scooter with a sitting walk, so that the avvy moves forward along the ground and the animation is not in the legs but rather in the wheels, steering, arms if it's a manual wheelchair, etc.