I just finished listening to "The Strange Case of Dr. Jekyll and Mr. Hyde and other Tales of Terror." I really liked MK's voice in these, particularly the first 2 stories ("Dr. Jekyll and Mr. Hyde" and "The Body snatchers"). To me, his voice sounded rather "gravelly" (particularly in the first story), which I liked; however, at times I did feel like saying, "clear your throat!"
My least favorite story was the third one, "Olalla." It was just hard for me to follow, and I admit I didn't listen to it as closely as I did to the other stories. I did keep thinking that this was a vampire story, especially when the mother bites the narrator's bleeding arm, but vampires are never mentioned. Although, a wikipedia article about the story mentions vampires:
Samfan