Until I saw Memories, I wasn't familiar with his work. His Magnetic Rose is one of the most riveting short films I've ever seen, in any medium. I have yet to see Paprika or Perfect Blue, but I intend to.
How involved was he in Roujin Z? I remember liking that, but it's been so long since I've seen it.
If you ask me, most of us die too young, but I think this man still had a lot of stories to tell. RIP.
Just found out about this while listening to the Behind the Screened Door podcast, read through the translated version of his final words. I discovered his works earlier this year and bought his 4 feature films, have not seen Paranoid Agent or his short in Memories but I really need to track those down now.
I really enjoyed all his films, he has a similar sense of narrative design as Miyazaki but of course his films are very different in tone. I mean that his films transcend their Anime trappings to just be great films that happen to be animated. I think Perfect Blue might be my favorite, at least the one that had the most impact on me.