Despite his long, active career, I never had the chance to meet or interview him, which is a big regret. From what I've heard and read, he was an endlessly fascinating guy.
I do have a favourite memory, though, which relates to his spare style and amazing ability to determine exactly how to fit into a piece of music. In 2002, I saw him play with Marilyn Crispell in San Francisco as part of her trio. I don't have notes from the show, so I can't recall which song it was, but I remember one long, contemplative piece where his accompaniment during one passage consisted of exactly one cymbal strike... and it was perfectly placed. He watched, listened, waiting, and touched the cymbal just once. That was all that was needed, and he knew it; and he had the lack of musical ego to not go beyond that realization.