FF (JB)

Hulk (all of it)
Firestorm
Power Man and Iron Fist  Priest and Mark Bright
Thor (Simonson)
Superman (JB)

Batman and the Outsiders

New Teen Titans Wolfman Perez

Justice League (J. M. DeMatteis and Keith Giffen)

Iron Man (David Michelinie and Bob Layton et al)

I basically am always art first so I would bop around to art I liked and then get caught up in the stories

I'll have to go back and do some deep thinking on all the titles I seemed to collect the most, but for me, it kind of boils down to this:

1980 - 1984:  Almost a complete a total Marvel zombie

1984 - 1986:  Mostly Marvel, with some DC titles, and a smattering of independents (for better or worse, SECRET WARS jumpstarted comic collecting as my full-time hobby)

1986 - 1987:  Made the move to DC titles when JB jumped ship--DC started to outnumber Marvel for the first time, for me.

1987 - 1988:  Almost exclusively DC, any Marvel titles I bought were practically nil; overall collecting was at a low ebb

1989:  JB's return to Marvel, and Batman's advent to the theaters helped skyrocket my interest in comics all over again--kind of went nuts collecting for the next 3-4 years!

I was deep into the hobby from 1982-1987.

FF (JB)

Alpha Flight (JB)

Hulk (JB)

New Mutants (Bill S. and beyond)

X-Men (~175) - I really liked it up through the Mutant Massacre. Longshot joined and I left.

Peter Parker, Spectacular Spider-Man (I may have enjoyed these stories more than ASM for some reason - black suit. black cat)

Iron Man

Secret Wars (I enjoyed it! apologies...)

Daredevil (Harlan Ellison's #208 was great) 

Teenage Mutant Ninja Turtles (B&W stuff)

GI Joe

Star Wars

Avengers (Buscema's run)

Superman (JB) - The one with the Phantom Stranger was my favorite.

It never crossed my mind then to buy a Batman comic for some reason. Batman was my earliest favorite childhood character. Did the Batman covers stink in the 80s or something? They didn't catch my eye, that's for sure.

I started off the early 1980s enjoying the DeMatteis/Zeck/Beatty run on Captain America, especially the Deathlok issues...

But of course, like many here, it was the Byrne Fantastic Four run that defined my perception and enjoyment of the Marvel Universe.

Some memorable issues/covers for me include:

Stern/Romita Jr -  THE AMAZING SPIDER-MAN

DeFalco/Frenz - THE AMAZING SPIDER-MAN

Stern/J.Buscema/Palmer - THE AVENGERS

Barr/Bolland - CAMELOT 3000

DeMatteis/Zeck/Beatty - CAPTAIN AMERICA

Wolfman/Perez/Giordano - CRISIS ON INFINITE EARTHS

Miller/Janson - DAREDEVIL

Byrne - FANTASTIC FOUR

Michelinie/Layton/Romita Jr - IRON MAN

Byrne/Giordano - MAN OF STEEL

Wolfman/Perez - THE NEW TEEN TITANS

Simonson - THOR

Claremont/Byrne/Austin - UNCANNY X-MEN

Perez/WONDER WOMAN

The Invincible Iron Man by Michelinie, Layton, JRjr & Bright.

The Amazing Spider-Man by Stern & Romita jr.

Captain America by Stern, Byrne & Rubistein

The Fantastic Four by John Byrne.

Daredevil: Born Again by Miller & Mazuchelli.

Batman: Year One by the same team.

Watchmen by Moore & Gibson

Secret War by Shooter, Zeck & Layton

Various titles by Bill.Mantlo: Spectacular Spider-Man, Rom, Hulk, etc...

Gruenwald's Captain America.

Amazing Spider-Man by Michelinie & Various.

Byrne & Stern's Superman runs, but i discovered them in the early 90 when i moved to the original version, since DC wasn't published in France after Crisis, we didn't got the relaunch.

And i'll add Crisis, by the way.

And Hulk by Peter David.

The X-Men, Iron Man and Stern's Spider-Man are my top favorites, with also the issues of the FF with She-Hulk.

That's for american comics, but the french super-heroes series Photonik and Mikros are also favorites of mine

John Byrne on ALPHA FLIGHT

John Byrne on AVENGERS: WEST COAST

Frank Miller on BATMAN: THE DARK KNIGHT RETURNS

Frank Miller & David Mazzuchelli on BATMAN: YEAR ONE

John Byrne & Roger Stern on CAPTAIN AMERICA

Roy Thomas, John Buscema, and Ernie Chan on CONAN THE BARBARIAN

George Perez & Marv Wolfman on CRISIS ON INFINITE EARTHS - - mostly for the artwork

Frank Miller's initial run on DAREDEVIL

Frank Miller & David Mazzuchelli on DAREDEVIL: BORN AGAIN

John Byrne on FANTASTIC FOUR

Mike Grell on the GREEN ARROW: THE LONGBOW HUNTERS mini series

Sal Buscema & Bill Mantlo on THE INCREDIBLE HULK

John Romita Jr., Bob Layton, & David Michelinie on IRON MAN

Mike Grell on JON SABLE: FREELANCE

John Byrne, John Ostrander, and Len Wein on LEGENDS

John Byrne on the MAN OF STEEL mini series

George Perez & Marv Wolfman on NEW TEEN TITANS

Kerry Gammill & Mary Jo Duffy on POWER MAN / IRON FIST

Frank Miller on the RONIN mini series

John Byrne on THE SENSATIONAL SHE-HULK

John Byrne on SUPERMAN

Keith Pollard & Roy Thomas on THOR - - I stopped reading the title before Walt came on board

David Lloyd & Alan Moore on V FOR VENDETTA

Dave Gibbons & Alan Moore on WATCHMEN

Frank Miller & Chris Claremont on the WOLVERINE mini series

George Perez & Len Wein on WONDER WOMAN

Mike Mignola & John Byrne on the WORLD OF KRYPTON mini series

John Byrne & Chris Claremont on UNCANNY X-MEN

JB's Superman run

Anything by JB, really.

Miller's Daredevil

Simonson's Thor

Uncanny X-Men

New Mutants

The New Teen Titans (when Perez was on it)

Stern/Byrne Captain America

Ostrander's Suicide Squad

Perez Wonder Woman

Crisis on Infinite Earths

Stern's Avengers run

Many of these have been mentioned already, but:

Captain Britain by Moore & Davis

Moon Knight by Moench & Sienkiewicz

X-Men by Claremont & Byrne

Alpha Flight by JB

Power-Man & Iron Fist by Duffy & Gammill

Conan by Thomas & Buscema

Daredevil by Miller & Janson

Captain America by Stern & JB

Iron Man by MIchelinie & Layton & Romita JR - then Bright

Excalibur by Claremont & Davis

The whole Ring of Power, Siegfried, Celestial's storyline with a couple Wagner operas thrown in there. It was a romp to occasionally escape into Asgard lore. 

I too followed everything JB did, and loved his output in the 80's.  I understand how he feels about how his time at DC turned out, but the stories he created there were amazing.  Of course I haven't come across a book that JB has done that I haven't enjoyed.  I like some better than others, but they're all enjoyable.

X-Men was tolerable through 209, but I strongly dislike the cover to X-Men 210, detest the Marvel Mutant Massacre, and think most of what follows is dreck, though I still collect it to this day.