In honor, I am rereading The Adventures of Sherlock Holmes. I have a quality paperback that is supposed to be a facsimile of the original edition, with Sidney Paget's illustrations. I also have The Memoirs...; they came as a pair. I have a paperback of The Hound of the Baskervilles, that I got when I was in junior high! I'm actually not sure that I've read any of the other novels; much more familiar with the short stories.
For me, Jeremy Brett is the definitive Holmes. Basil Rathbone was very good, too, although I think a number of those movies had original plots not from the stories. The Cumberbatch series is excellent in its own way, and really fascinating. I particularly enjoyed the character of Moriarty in that series. Elementary was also a good series.
And don't forget the movie The Adventure of Sherlock Holmes' Smarter Brother! So long since I've seen it, but what a comedy cast! Gene Wilder, Madeline Kahn, Marty Feldman, etc. Basically a Mel Brooks film, only without Brooks - Wilder wrote and directed.