Anyway, new feature of the weblog, I'm going to start going through each series I have, writing a bit about each and deciding what I want to keep (and for some which issues I need to add to my wantlist). As for the order, I'm counting down in terms of quantity, which currently gives me about 200 entries before I get down to books I have fewer than a dozen issues of (there are a lot of series with only one or two issues in my collection, between bookshelf-type formats, books I tried and didn't like and just short-lived things).
In general I use GCD methods for naming books and identifying series, so new publisher or new official title or long publication gap mean new series even if the numbering continues. There are some exceptions.
And the series I have the most issues of? A fanzine, actually.
121 issues [1973 - 1984]
99 - 219
Anyway, I had a few late issues of this from early in my collecting days, and a while back got most of this run all at once. There's a lot of weird fun stuff in here, especially on the covers, a mix of fan and pro work (a few highlights include the Kirby covers on #100, Simonson's Manhunter, Dan Spiegle's Blackhawk, Ditko's Machine Man some good Aragones, Hembeck, Rosa etc.). It was digest sized (5.5x8) with mostly black and white covers (except #99 and #100) up to #137, started adding colour on the covers with #138 (at first just one or two colours, but soon full colour). With #139 they also started to have artwork on the backcover as well as the front. #164 saw the magazine change to regular comic size (7x10) and adding lot of pages as they merged with Street Enterprises' comic strip reprint newspapers, so each issue after that included some comic strip reprints (including Modesty Blaise, Star Hawks, Superman and Captain Kentucky). Some other nice regular features included Fandom Confidential (Jim Engel and Chuck Fiala's fumetti humour page) and Don Rosa's Information Center.