My favorite guitarist:
Unfortunately in 1989 he was diagnosed with ALS (he was just 20 years old), and was given three to five years to live. However right now it's 2015 and he still isn't dead yet.
"he isn't dead yet" might not sound very respectful, but i'm referring to the documentary about him:
Jason Becker: Not Dead Yet
This guy is such a great inspiration to me.
Jason was also in a band called 'Cacophony' with another guitarist: Marty Friedman (if you're into metal, Marty also played in Megadeth).
Jason Becker obviously can't physically play the guitar anymore, but he still composes music. He uses his eyes to communicate and compose music, as you can see in the documentary.
In 2014 Marty Friedman released a new solo album called 'Inferno'. One song on it was co-written with Jason becker:
This song actually made me cry the first time i heard it. Not just because i liked the melodies and stuff, but it was actually like i heard Jason Becker playing the guitar again.