There are a couple transcribed lectures of his on amazon, one of them "Computation and the Future of the Human Condition", they are short and deep and I find them very interesting, I read them maybe a couple years ago... somehow within that little context I was so entranced by the underlying concepts and material which just clicked with me, that this aspect of Wolfram's personality completely escaped me... My partner tried to read them and immediately picked up on it, now identified - I find everything I read from him slightly tainted. I've yet to pluck up the courage to read NKS, i'm worried I will not be able to get through it.
It's a shame because I believe some of the work he has produced and ideas he has explored to be a truly fundamental and under-explored part of nature, hopefully enough of us will appreciate that without letting his personality get in the way.