Him and Heath Ledger (more so Williams, though) really, really got to me.
I can't watch anything of his without getting choked up, especially Hook and Dead Poets. Or Mrs. Doubtfire-- that ending was always a dam burster but now the added poignancy just obliterates me.
All that stated-- I'll be watching Robin Williams movies until I die. No man has made me laugh as much or as continuously as he did. And does.
Long live the Pan!
Btw, his performance in Toys (and Toys in general, one of my favorite films) remains perhaps his most underappreciated work. I am heartbroken the only HD version of the film is (seemingly) exclusive for Starz.