Was going through the Old Stuff, this weekend, and got nostalgic for Marvel's summer of 1988 (30 years ago, coincidentally). There were quite a few storylines that I would look forward to, every week, that summer.
1- X-men in the Australian Outback. Lot of action with the Brood, Genosha, then the slow-build to Inferno.
2- GI Joe and the Cobra Civil War. Aside from the "Silent Snake-Eyes Issue (#21)", one of the universally-praised stories of the entire series. It's a big all-out-war 3-way dance on Cobra Island...then Destro arrives to make it FOUR.
3- Captain America/US Agent. In the final months of a 2-year storyline and pay-off. Culminated with issue 350.
4- Avengers had a somewhat lame "break-up" storyline, involving Dr. Druid and Kang. Still kept my interest, because it signaled that a roster re-shuffle was pending (so imagine my disappointment, in the fall, when it turned out to be Cap, Thor, GILGAMESH, Reed Richards and Sue Storm).
5-"Marvel Comics Presents" and the lead-in to the new "Wolverine" series. While I was never a huge fan of the Madripoor/Patch stuff, it was at least different and not at all what I expected.
6- "Amazing Spider-Man" had settled into a groove, post-issue 300 and every new issue seemed like a Big Deal with Todd McFarlane. (with hype like "wait until you see his rendition of the Scorpion"). I think this was the summer Peter Parker went on a book tour and visited a buncha' villains around the country.
7- "Evolutionary War" crossover-- I think this was Marvel's first crossover conducted solely in the annuals. It wasn't too cohesive and more of a theme than a crossover, but it was something new and unknown ("All of the heroes end up facing a scheme connected to the High Evolutionary"). I did like that it ended with "The Captain" (Steve Rogers) leading a team of temporary Avengers (the female Yellowjacket, Beast, Hulk, Falcon, Hercules and Jocasta. THAT was the new Avengers team I was hoping for.
8- Hulk as "Mr. Fixit" in Las Vegas.
9- Black Panther had a pretty cool mini-series.
10- Even stuff like "Daredevil" and, believe it or not, "Transformers" kept me entertained. I was a few years removed from Transformers toys and cartoons, but I remember actually liking the build-up to issue 50. Then it sucking and me never reading it again.
I'll have to check, but I think DC was also keeping me happy with the Giffen/DeMatteis "Justice League". I think that book began to lose steam at the beginning of 1988 when artist Kevin MacGuire left, though. It began to get a little silly, as I think L-Ron and Manga Kahn came along that summer. Batman's "Death in the Family" was worth following, plus I really liked the "Invasion" crossover that began in late August or so.
Also helped that I was working ("helping my dad") in magazine delivery on a weekly basis, so I always knew what would come out. "It's been two weeks, so where's the new...yup, there's the new X-men!"