I am down to about a dozen monthly titles now, and maybe 5-6 limited series type books a month. Like Jeff, I've given some serious thought to dropping them all. I've limited myself to mostly Avengers-Based Marvel titels, Star Wars, Transformers, and Walking Dead, so can't relate to the DC issues as well, but Marvel has their own problems.
My biggest gripe is the lack of continuity. Marvel has prioritized marketing over storytelling, which is obviously problematic when you publish books. I remember reading fun stories about the characters when I was a kid - the conflicts that arose from a dual life as a superhero, relationship issues across the teams, and obviously mixing it up with the bad guys. One of my favorite storylines ever was the Demon in a Bottle story from Iron Man, when Stark's alcoholism finally gets the best of him and he loses everything. I love the armors and IM villians, but as I recall, most of that story is just Stark either in a gutter or in a lab, while Rhodes takes over the suit. And the best part was how the story integrated with the rest of the Marvel U. Rhodes was the Iron Man sent to the Secret Wars and the Iron Man that founded the West Coast Avengers. He had to deal with people thinking he was Stark or at least white, which added to the story within a story to make it allso interesting.
Nowadays, the stories don't make sense at all. I can read about a huge lineup change, then see a totally different lineup represented in another book for months and months beyond that point. There's no explanation for HUGE shakeups, ranks, or even costume changes. When did Rogers decide to go back to being Cap? That should have been a big decision, not something just glossed over. We spent half a year agonizing over who was going to be the new shield bearer when he died, but he apparently quits as head of security and goes back to just another supe between panels. When and why did Hawkeye change his costume? He just shows up in several books with a new outfit and no explanation? Of course, he has the old costume all through his own limited series just finishing up now. How is Hank Pym fighting crime, mentoring the next generation of Avengers, AND now a part of the Secret Avengers group, where he just whipped together a space station for their new base. Really? Give me 12 months of them trying to rebuild the NY mansion after the Masters of Evil beat Jarvis to a pulp. I get that it's all make believe, but do they really need to suspend the concept of time to tell these stories? I just think it comes down to lazy storytelling.
And don't even get me started on the marketing BS. How can Wolverine possibly be in multiple Avengers and X-Men teams? He's always hanging out at Avengers HQ, but supposedly he's running his own branch of the X-Men now too? And Spiderman...I guess spiders don't sleep, because there is no other way he can be in that many storylines all at once. He has how many individual books in addition to being in the new Team-up book, an active member of the Fantastic Four, and at least one Avengers team or the other. Oh, and every major event in the Marvel U as well. I'm sure it won't be long until one of those guys are killed and resurrected, just like we've seen with Captain America, Herc, Thor, Ant-Man, Hawkeye, Jocasta, Vision, Bucky, Mockingbird, Elektra, etc. in the last few years. If you're going to kill someone off, then off them and be done with it, or at least keep them dead for a full 2-3 years. Its hard to have any concern for these characters anymore - my only real fear for any of them is that they might fall out of popularity and then you'll never hear about them again (where are you Stature, Black Knight, and Photon!?).
The storylines get worse while the price skyrockets. At $4 an issue, I definitely need to put some serious thought into taking a comic hiatus as well. Its really a shame that despite all the advancements in the comic industry, the major players can't tell a good story to save their lives (or their businesses).