Looking at the comics cover-dated December 1981, the month seems notable more for stuff I didn't buy at the time. I don't think I bought any of these comics when they were initially released, but I either got them as back issues or reprints. So, the list of comics I wish I had bought as new in December, 1981 includes:
All-Star Squadron #4 Once I started reading All-Star Squadron, I was hooked, and collected everything back to the first issue. At this point, however, I probably thought it was just another superhero comic. Or hadn't even noticed it yet.
Amazing Spider-Man Annual #15 Actually, I've never actually read this. And possibly Frank Miller's name wouldn't have meant anything to me when this was published (although it might have, since he was writing and drawing Daredevil by this point). But it just seems to me that if I knew more about comics at that point, I wouldn't have let a Frank Miller-illustrated Spider-Man comic pass me by.
Nexus #1 Nexus would become one of my favorite comics, but it wasn't really on my radar until issue #3 came out with its flexi-disk read-along soundtrack. And it would be quite some time before this first issue was reprinted in an affordable format. So I didn't become a fan of Nexus, Mike Baron, or Steve Rude as early as I might have.
In fact, if I did buy any of these comics when they were released, it probably would have been Condorman #2. Because I was fascinated by the idea of a Disney movie about a superhero, and was super-excited about that movie. (I have it on DVD, but haven't watched it. Will it hold up to my memories? I'm almost afraid to find out.)