I'm 39 and I was a comic-a-holic. Now I'm in recovery but it's a never ending process.
I have 4 cases of comics in storage. I try very hard to resist buying any these days.
I have an original Elseworlds "In Darkest Knight" where Bruce Wayne gets the Green Lantern ring instead of Hal Jordon. I have both Gen 13 and Spawn #1's (among very many other number 1's). I even have the beginning of the "Preacher" series.
I have the first 20 or so of the Nightwing solo series done by Dixon, McDaniel and Story including the Wizard 1/2. This was the series that made me go "WOW, comic art can be amazing." The art alone made the book worth reading but the story of a bunch of bodies washing up in Gotham harbor and Dick branching out to his own city (Bludhaven... Bloodhaven... I forget) to solve the mystery was loads of fun.
If you can't tell, I've alway been more of a DC guy than a Marvel guy but I do have some Spiderman, Avengers and Punisher stuff.
For example I have the entire Scarlet Spider "Clone Storyline" of Spider Man's from back in the 90's.
I used to have both Punisher and Punisher War Journal #1's but I sold them.
I have a signed copy of the Death of Superman but it has been opened.
I have original copies of "Kingdom Come" although I doubt they are worth diddly because I've read and reread them so many times.
I liked Hal Jordan but after the Coast City and Parallax thing I got really tired of his whiny crap. Both he and Green Arrow turned into a couple of badly written drama queens. So I'm actually much more fond of Kyle Rayner. I always loved to hate Major Force ever since they put an A-Bomb under some alien metal and made Captain Atom and when MF killed Kyle's girlfriend and then him discover her stuffed in his fridge... oh man I was hooked.
Nightwing is still one of my all time favorites. But I got into comics because of Barry Allen and the Flash.
I still love comics but once they brought back Barry Allen I just couldn't take it anymore. I had seen a lot of heroes fall and be risen again (the way Kevin Smith brought Green Arrow back to life was particularly awesome) but once they confirmed an afterlife with the way they brought Hal Jordan back as the Spectre and then Barry Allen... well death really just didn't seem like that big a deal anymore. Some heroes were on long trips through space that lasted longer than others were dead.
In fact I think I saw that as a joke in one comic where two heroes are catching up and the one says something like "yeah I was traveling this other galaxy trying to discover something or other and save blah blah blah so I was gone a couple years." and the other one says "yeah while you were gone I got killed by this one evil dude but I'm ok now."
Once the fear of death is taken away I just couldn't see the drama anymore. Worlds get destroyed, heroes die, blah blah blah. It all goes back to being ok at the end of the story arc.
So I'm pretty much done with print comics. For me, webcomics tend to be a lot more interesting and original. I do pick up the occasional graphic novel. I recently picked up Batman: Ten Nights of the KGBeast as I used to have original copies of it when I was a teenager. The story is good but the art doesn't hold up. And the fact that Batman basically left the KGBeast to die was so cool and original in that story. But since then; Dc brought him back again which is as I said, both lame and the reason I don't read print anymore.