I'm a fan also! My first boxed set was Ravenloft´s red box, and the first adventure I had and ran was Night of the Walking Dead, which is part of Hyskosa´s Hexad. I have ran that adventure many times and I like it very much, not only because if the first one I had and I know it well but also because it is solid, elegant, and has spooky moments and many opportunities for drama, specially for novice players. All of the greatest heroes of my campaign world have gone through it.
I don't have the 6 modules of the hexad but I would love to DM or play them on 5e. Good luck and let us know how it goes!
I own Forlorn´s boxed set and it bothers me that I never had the chance to play it. Back in the day I spent days and days puzzling in the complexity of castle Tristenoira and it´s time shifts and I feel that, if the DM is ready, it can be a very cool experience.
Which is your favorite Ravenloft´s adventure?
How about other Raveloift´s accesories? The Torakka deck is a must, and "Champions of the Mists" had some awesome kits.