I ended up picking up the Dark Tower books midway through November and finished them before Thanksgiving. Loved them. My brother's been reading them for years and recommending them to me, but I've foolishly avoided listening to him. I'm done with The Waste Lands and over Christmas break, I'm going on a King marathon- It, Insomnia, Talisman and Black House, Hearts in Atlantis, the Stand, and Salem's Lot, not to mention giving Eyes of the Dragon a re read (that was first King book, read waaay back in the 4th grade). After that, I'm moving on to books four and five. Of the three, I've really enjoyed the Waste Lands and I'd have to give my favorite character (short of Flagg) to Blain the Mono, though Roland and Eddie are great too.
I know Flagg is going to be getting his come upance (Though I think the Crimson King is a being seperate from Flagg. I get the impression he is more of a servant). I know Dennis and Thomas will be involved in that somehow, but I'm not sure if it'll go to those two or Roland to deliver justice.