Although he didn't start very well on CR, and people never gave him a fighting chance, him and I talked once-in-awhile and he wasn't too bad for the most part after our initial differences.
I'd only met him a few times in person, but it's sad to see someone dedicated to so much go so early, and my prayers go to his friends and family. Peace be with him and them.
That being said, my wife's uncle died in his sleep at 30 of a condition called "Sleep Apnea", where he randomly stopped breathing for extended periods of time. One night, he never started breathing again.