I had owned Amazing Spider-Man #258, American Flagg #14, Marvel Graphic Novel #12, ROM #59, Uncanny X-Men #186, and Vanguard Illustrated #7. All from back issue bins though.

32 comics for that month. I guess you can say it was the zenith of my comic buying years.

All Star Squadron # 38
Alpha Flight # 15
Amazing Spider-man 257,258
Avengers 248
Batman 376
Batman and the Outsiders 14
Defenders 136
Detective Comics 543
Dr. Strange 67
Dreadstar 13
E-man 20
FF 271
FF Annual 18
GL 181
Hulk 300
Iron man 187
Iron Man annual 7
Sable 18
JLA 231
JLA annual 2
Secret Wars 7
Marvel Tales 168
New Mutants 21
Teen Titans 2
PPSS 95
Swamp Thing 29
Superman 400
Tales of the Teen Titans 47
Thor 348
Thor 349
X-men 186
WCA 3
What If ? 47

August, 1984 link: www.dcindexes.com/features/timemachine.php?site=all&type=calendar&month=8&year=1984&sort=alpha

My list:

Alpha Flight # 16
Amazing Spiderman Annual # 18
Avengers # 249
Avengers Annual # 13
Daredevil #213
Defenders # 137
Epic Illustrated #26
Fantastic Four # 272
Incredible Hulk # 301
Iceman # 1
Iron Man # 188
Kitty Pryde and Wolverine # 1
Machine Man # 3
Secret Wars #8
Marvel Team-Up #147
New Mutants #22
New Teen Titans # 3
Peter Parker, Spec. Spiderman #96
Powerman and Iron Fist #111
Rom #60
Uncanny X-Men # 187
West Coast Avengers (LS) # 4

A bit later bought Saga of Swamp Thing # 30, and MUCH later bought floppies of Omega Man #20 and the full run of Dreadstar, including this month's Dreadstar # 14. So 22 issues that month, with 3 purchased later on.

New Teen Titans was the 1st DC title I started getting on a regular basis although in retrospect I may have purchased issue 1 or 2 rather than starting with 3. Don't know what took me so long to snap out of my Marvel Zombie phase but am glad I did!

A few cool annuals this month, with Stan Lee scripting Amazing Spider Man Annual #18 and Ditko providing pencils on Avengers Annual #13 (with Byrne inking)

While I'd been enjoying some of Marvel's limited series in recent months, I found Iceman to be a total dud, and couldn't get into Kitty Pryde and Wolverine either (Al Milgrom's work just doesn't do much for me). Of course I bought the remaining issues in both LS anyhow, go figure.

Avengers crossed over with the Ragnarok story in Thor, and Uncanny X-Men featured the Dire Wraiths from Rom.

Bought my first Epic Illustrated because it had  "the Last Galactus" story  by Byrne (and what a great cover!) but was blown away by the rest of the issue too!

August 1984*:

Flash #336
Tales of the Legion of Superheroes #314

*all bought WAY after 1984 

(As usual, not purchased at time of release. Gonna be four years before I get to make one of those posts)

Alien Worlds #4
American Flagg #3
Arak Son Of Thunder #27
DC Graphic Novel #1
Defenders #125
E-Man #9
Epic Illustrated #20
Hawkeye #4
Iron Man Annual #6
Krull #1
Marvel Fanfare #11
Rom #48
Twisted Tales #5
Uncanny X-Men #175

Wow, kind of a lot. This is a little patch filled with comics I picked up while hoarding cheap Copper Age stuff on eBay a few years back. Some of these I'm not 100% sure of, like Rom, I just know I had a ton of them. Some others, like the Archies were left off because I wasn't sure about those, but had far less steady runs of Archie sister titles than I did of Rom.

Hawkeye #4 and Iron Man Annual #6 are the only two that I believe I bought as a kid. The rest were fairly recent.

Books I currently have in original form...

All Star Squadron #39
Arak, Son of Thunder #38
Arion, Lord of Atlantis #25
Aztec Ace #5
Batman #377
Conan the Barbarian #164
DC Comics Presents #75 (Arion app)
Dreadstar #14
Flash #339
Green Lantern #182
Infinity Inc. #8
Mighty Crusaders #10
New Gods #6
New Mutants #33
New Teen Titans #3
Power Man and Iron Fist #111
Six from Sirius #3
Superman #401
Superman Annual #10
Tales of the Teen Titans #48
Uncanny X-Men #187
Warlord #87

and in trade:
A Distant Soil #3
Batman and the Outsiders #15
(Saga of the) Swamp Thing #30

-M

One thing my wife finds bizarre is how I remember past events by what comics or books I was reading when they happened. Looking at those Aug 1984 comics, my only reaction seems to be "can it have been 30 years already???"

That month, I bought the following issues:

Arak 36, which started resolving the Serpent storyline in an unsatisfying manner. That dude was supposed to be Satan, for crying out loud, and he turned out to be some kind of sorcerer.
Conan 161, another crappy issue from the bad old years, this one with a resurrected Fafnir with a demonic arm. Urgh.
Kull 5, with a cool Michael Golden cover and a good Alan Zelenetz story. Kull was the only good Howard-inspired book at the time.
Marvel age 17, always a fun read in those pre-internet days.
Secret wars 4, with the unbelievable scene where Hulks holds a mountain range over his head. I'm not so much surprised that the Hulk be that strong, but rather that the mountain doesn't simply collapse.
New mutants 18. Aaaah, now you're talking! The great Bill Sienkiewicz art gives Chris Claremont's thrilling plot an extra dimension, and that cover is outstanding!
New Teen Titans 1, the brand new series on whiter Baxter paper. I sort of had forgotten that for a few months I had been reading the Teen Titans... from issue 25 to the rebooted #2.  Both Teen Titans and Legion of super-heroes were undergoing an experiment in publishing: for both titles, DC would produce a higher-quality comic that would be reprinted a year later as a standard comic, in a scheme reminding one of the hardcover first / paperback later publishing of prose novels. The nicer format would be an opportunity for fan favorites George Perez and Keith Giffen to shine even more than before, but alas both artists left their respective book after a few issues. Oh, and plotwise, killing Raven was jumping the shark. Just sayin'.
Savage sword of Conan 103, another perfectly forgettable generic issue about a guy in a fur loincloth who happens to have the same name as a famous Robert E. Howard character. But do not despair, Hyboriophiles! In just two short months, a writer named Don Kraar will finally make this mag interesting again!
Tales of the teen titans 45. As one realizes immediately, the hardcover/paperback strategy means that during the first year, the "reprint" title has nothing to present. This title, which continues the numbering of the first New Teen Titans book, presented original stories during that first year. 
Thor 346, continuing Walt Simonson's defining run on the book. Ragnarok is coming!
Uncanny X-men 184, back in the days there was only one X-Men title. The book still managed to surprise us because its direction was not really defined; it did not read like a franchise book. Back then, the cast was allowed to evolve and change; some characters would go away little by little, and others would join little by little, in a very organic way. 

To think that all those comics could be bought for less than ten bucks...