I've been working my way thru SHERLOCK HOLMES the last couple years.
Crazy enough, I started getting the Ronald Howard TV series on DVD. This was the 1st complete TV series I've upgraded from VHS to DVD. (The 2nd was the Adam West BATMAN.) Although they didn't have the best source material, it was still such a massive upgrade, I've watched the entire series 3 times so far. I really enjoy his youthful, enthusiastic Holmes, and Crawford's loud, boisterous Watson.
I then got the 1965 Douglas Wilmer BBC series. 11 of his 13 episodes still exist. I can't describe how much I love these. Nearly all of them were later also done by Jeremy Brett, and it's fun to compare the versions. Right now, I really prefer Wilmer over both Cushing AND Brett! It's the damnable BBC's own fault they didn't get him back to do more.
Next up was the 1968 Peter Cushing BBC series-- tragically only 6 episodes of which were NOT wiped by the idiots at the BBC. They include the 2-part adaptation of "The Hound Of The Baskervilles", which is infinitely more authentic to the book (though still not perfect) than the 1959 Hammer film Cushing also appeared in.
And then most recently I got the MPI box set of all 14 Basil Rathbone films. The 12 by Universal have all been restored from the best-possible sources, and what a joy it is to watch ALL 14 movies in sequence in such decent condition. (One bizarre quirk, is that right in the middle of "...The Voice Of Terror", there a short part where the picture and sound are not QUITE in synch. The beginning and end of the film are fiine. How do you put that much work in and get something like that wrong?)
I'm watching each of these sets at least twice each before moving on. When I'm done with Rathbone (in about another 6 weeks) I'm planning to go after what I can find of the 5 Arthur Wontner films from the 1930s. I've long had 2 of them on tape, and have recently seen 2 more (I think) on Youtube. I'm pretty sure they're not all available as one set, but, we'll see...
I taped all of the Jeremy Brett's off of PBS back in the 80s, but eventually, I'll probably look into upgrading those as well. But there's so many others I want to go after first.