Sorry to hear about all of the injuries!
Just thought I would mention: on the advice of the most hard core skier I know, this year I invested in a pair of high impact/ extreme sport knee braces in order to keep my legs in good shape. I already have a weak ACL from years of abuse, so I decided to bite the bullet and throw down on a pair of Asterisk Cell braces:
I think they were originally designed for motocross but they are awesome for skiing and riding too. I won't ever hit the slopes without them again, and I think every skier should be using a pair- its kind of like having your ski boot extend all the way up your leg! (And I have had no problems with comfort)
Pod/Fox and EVS also make similar models, but the Asterisks were a little cheaper, and look just as good to me.