Sometimes losing a total stranger can be oddly personal. I think it is a testament to how much of himself Robin Williams put out there that so many are deeply affected by his death.
I don’t know what he was like in private, but it’s hard to believe it was all that different from his public persona, which was a mix of antic joy and genuine pain. He was a clown in the classic sense, a harlequin, the embodiment of our demons. He will be greatly missed.