I know that he wanted to be remembered for his work with other addicts, but the ability to make people laugh is a rare and special gift, and was of no less worth than his charitable endeavours.
More so than ever, we need to try to find humour in our lives, and the fact that a group of total strangers online are still smiling at his performances and at his impeccable comic timing, is a tribute to his talent. The fact that he turned up for work, and (as far as I'm aware), never missed a single day's filming is also a testament to his character. He may not remember whole chunks of his work life, but he still showed up and he still made us laugh, he must have felt absolutely dreadful at some of those recordings.