First I'd recommend reconsidering Manga, since it's a broad medium and there may be genres that you do enjoy if you can find them. I think Azuma Kiyohiko's manga (Azumanga Daioh, Yotsubato - both Slice of Life) are enjoyable for most people. The furigana and the fact that the story is also in pictures just makes the medium rather convenient.
But if you really just don't like comics as a medium, I'd consider videogames next. They're actually what I spend the most time on. Very scene-intensive RPGs like the PSX line of Final Fantasy games (especially 9) are nice (things like Zelda are fun too, but the game-to-story ratio tends to be balanced so you spend a lot more time just playing than practicing any Japanese), and I also really recommend visual novels, if you can find anything you like - which can be challenging. But for example, the Ace Attorney series is an absolute blast. While I'd normally recommend not caring too much about how much you understand, though, you'll obviously need to be able to understand enough of that game to at least solve the cases.
Note that Visual Novels are often confused with Dating Sims, which isn't accurate (they're different game genres). Though a lot of them
are focused on romance, and many are also erotic. But this isn't always the case, as in my example of Ace Attorney. Also things like Higurashi no Naku Koro ni, though that may be distasteful for other reasons (violent horror).
Finally there's always just novels! Novels don't actually have to be worked up to or anything. You can go after 'em right away. It's just about finding something that's enjoyable to read. And don't always fight for 15 minutes over one page! Let yourself just read through, even if you're not catching on to what it's saying. Spend time just letting yourself read.
Personally, I've found that I prefer reading other things at the moment, probably just due to my mental state, but there's no reason not to try. Especially light novels.. I've heard Kino's Journey is nice and somewhat simple? Or perhaps some nonfiction. I remember wanting to read ホームレス中学生 when I heard about it, but so far I haven't.
There's also magazines, technical manuals, newspapers, religious texts, horoscopes, whatever floats your boat. A nice blog is
http://nihongodaybyday.blogspot.com/ . Japanese blog about Japanese. We all at least share that interest, right?
Good luck!