I don't know much about him except I hated his random imagination(theory) ideas on space.
He gave a lot of random ideas on his thoughts on stuff but there was never any proof on anything he would say. Heck, he always would talk about the threat of aliens and what not.
I found that pretty much all of what he said was nothing more than thoughts of a wild imagination.
He was smart(ish)
It's the disability thing that brought the attention. Saying crap like "humans are vulnerable to being killed off by aliens so we should prepare ourselves" adds the (ish) to smart. Don't you think? hahaha
Ok, it's good for a conversation BUT not exactly a brilliant thought. haha, This guy was said to be an comparable to Albert Einstein.