The first books of his that I bought/read was The Green Mile. That was followed by Dreamcatcher (which I rushed through within a month -- So, I would have had it read when the movie came out). I then bought/read The Shining and for the last 2 years or so, I have been working on the Dark Tower series. I read the first one within 8 months (I'm a slow reader), I finished the second one last May, I'm about 2/3s through the third one, I have the 4th one waiting on my bookshelf, and I have yet to get 5, 6, or 7.
Books that I plan on reading include many of his classic stories (The Stand, IT, Salem's Lot, Carrie) and maybe some recent ones (like From a Buick
