I wasn't just a fan of his because I liked his movies, though I did. I mean, what's not to like? Aliens, Tombstone, Terminator, Apollo 13... he was in all kinds of cool stuff. But he also seemed like a genuinely good guy. He was humble and self-effacing in interviews, and always seemed to enjoy being around whoever was in his presence at the time.
He brightened our lives, even if just for a couple of hours at a time. And now he's gone, and the world is a duller place.
Rest In Peace, Bill.