I'd like to be "that" guy and start a thread celebrating my favorite era for the franchise: The Triangle Era! While technically running from January 1991 to January 2002, most people usually think of the Triangle Era as being the unbroken run of Dan Jurgens, Jerry Ordway, Roger Stern, Louise Simonson, and later writers and artists on the Superman books, extending from the time John Byrne left in 1988 to when Jeph Loeb took over in late 1999. The name comes from the little triangle on the cover of each Superman title that would allow readers to follow along chronologically with the serialized storyline of Superman. In essence, this would turn the three, then four, then five, main Superman books into one massive weekly series with rotating writing and art teams.
The Triangle Era has its roots in the Exile storyline, where the new creative teams had to dig their way out of a massive hole: On his way out, John Byrne had Superman commit murder against the Pocket Universe versions of General Zod and his crew. This should have been poison to the recently-rebooted Superman universe, but they dug their heels in and made it work, turning Superman's greatest moral failing into one of the best storylines ever run in the main Superman books. Afterward, things slowly fell into place with a few more linked crossovers, until all three Superman books operating as one voice became the norm with the start of 1991.
Contrary to popular opinion, this didn't deprive each creative team from putting their own flourishes on the world. In fact, it would allow more of Superman's supporting cast to have greater exposure then we'd get when there'd be less adherence to week-by-week continuity. For example, Superman: The Man of Steel would be the place where the stories of the Underworlders would be told, Action Comics would typically have a greater focus on Lex Luthor and the Matrix Supergirl than seen in the other books, and the Adventures of Superman would tend to incorporate a lot of Jack Kirby concepts. In fact, it was rarely the norm to have an unbroken story week-to-week. With the exception of some two, three, or four-part arcs (and naturally the huge mega-storylines like Doomsday, Funeral for a Friend, and Reign of the Supermen), usually each issue would be a standalone story that, at most, would be referenced in dialogue the following week.
Since getting back into Superman with DC Rebirth, I've gone back and started devouring this era. I can't think of any other time where Superman's world has seen so robust. Ironic, then, that this was without Kara Zor-El, the Legion of Super-Heroes, or many other Pre-Crisis concepts that wouldn't be reincorporated into continuity until the mid-2000's. In their absence, we had new heroes: Gangbuster, Steel, the '90s Superboy, Matrix/Linda Danvers, and many more. We had a greater focus on the Daily Planet and WGBS staff, with new introductions to the family like Cat Grant and Ron Troupe. Yes, the Kents were also alive, and whether you think this is good for the Superman mythos or not, it allowed us a window back to Smallville in a time when "The Adventures of Superman When He Was a Boy" didn't exist in the canon. Finally, this is where Lois and Clark went from rivals to best friends to husband and wife. It's a time where nothing, save for the core tenants of the character, was held TOO sacred, and, because of that, the quickly-expanding mythos and sheer glut of new characters came at a furious pace.
As a fan of this era, I find it disheartening that so many people who got into comics at a later date don't have a great familiarity with anything beyond the Death and Return trade paperbacks and some big flashy storylines like the Electric Superman saga. It's really not anyone's fault but DC's, as nothing from this era remains in print, with a full chronicle of Post-Crisis Superman usually ending with John Byrne's run. But man, there's SO much good stuff that's just waiting to be rediscovered, and the great news is that most of it is available digitially. So use this thread to reminiscence and share your favorite issues and arcs from this era, which is still the bedrock on which the Superman books are built today.