So among my early comics, those were among the ones I would re-read frequently, and I'd note O'Neil's name in any others I had, a GREEN LANTERN here, a WORLD'S FINEST there, and some editorial credits as well. After I stopped buying comics for a few years when the newsstand sources dried up I finally started making regular trips to comic stores around 1988, and among the delights I found was that in the interim DC had graduated from digest reprints to their deluxe full-sized "Baxter paper" reprint line, and I was lucky enough to get most of the issues of GREEN LANTERN / GREEN ARROW reprinting the rest of those stories I sampled in the digest, in much better form, and all of THE SAGA OF RA'S AL GHUL, which scratched that longtime itch that DYNAMIC CLASSICS had given me (and as a bonus I also got the reprint of the Manhunter story in that series of reprints). Well, that pretty much made it clear I was a Dennis O'Neil fan.
(I documented one of my many re-reads of THE QUESTION in an early series of posts on this weblog, including listing all of O'Neil's Recommended Reading List from the letter columns)
From there it just expands. Pretty soon I was also aware that O'Neil was the Batman editor of the time, as well as occasionally writing the character, and I was pretty all-in on the Batman books for a while. I also found out more about the past, and started picking up things like his 1980s DAREDEVIL run, some 1970s SUPERMAN issues with Curt Swan and a lot more. As reprints shifted from single issues to actual books, I discovered even more of his earlier work, and there were so many little things to discover. And I loved a lot of his later work. I'll try to highlight a few of them in another post soon.
Anyway, Dennis O'Neil was undoubtedly my favourite writer in comics among those who don't draw their own stories, and close to the top even without that qualification. As you can see from this particular section of my collection, there's a lot to discover.