I once saw this trippy indie movie called "Closet World". Wickedly brilliant in my opinion.
Rickman had a natural talent to play complicated characters with a vast gradient of greys when they no doubt were written to be black and white. He acted, directed, brought many characters to life and made them memorable. From a twitch to his lip to a subtle gesture, Alan Rickman was a treasure to the acting community and the world is a bit colder with his loss.