I love A Christmas Carol. I'll read most things with "Charles Dickens" on the cover, but I love A Christmas Carol. It's a feeling that I inherited from my dad, and I have for several years now been in the habit of re-reading this classic Christmas tale every year around the holidays. This is in addition to frequently attending whatever stage adaptation happens to be around, listening to the Patrick Stewart audiobook version several times (often while running), watching at least one movie adaptation (I like the Muppets version and the Patrick Stewart version the most), and for several years participating in a radio play adaptation for a fundraiser.
I came across this particular text when I was browsing through an actual bookstore, and added it to my list almost entirely because of the author on the cover; everything I've read of Asimov's, from his Robot books, to two massive compilations of his short stories, to Foundation, which is one of my most frequently referenced books, has been enjoyable, so I figured I was pretty safe to add Fantastic Voyage to my reading list, even though the description didn't sound very compelling to me. It's surprising, therefore, that I mostly found this story disappointing.