I've made no secrets about my feelings about Robin Williams. But even though his style of comedy wasn't my cup of tea, I do recognize that what he did, he did very, very well. And this is a very sad end, for anyone.
"Mork and Mindy" was a big favorite in my youth, as was Popeye. There was a time when I was very fond of The World According to Garp, and I really liked his "non-Robin Williams performance" in One Hour Photo.
I listen to a lot of comedians on podcasts, and no one ever had a bad word to say about him. He sounded like a hell of a nice guy, despite his struggles with substance abuse.