My problem is that I don't have much time to "create" adventures and stories like I used to. I started running 3.5 again this last year because there was an abundance of pre-written modules, be they from WotC, Dungeon, or other 3rd party sources. Of course, running mid-level adventures just got insane with 3.5, even with the stat-blocs already written out for me.
So I'm HOPING 4e delivers on it's promise to be easier to run and quicker to plan for. I've got a ton of other RPG systems sitting on the shelf, but I never have time to create a really decent adventure on a reoccurring basis.
To be honest, if 4e is a bust, I don't think I'll be buying any more RPG books. More often than not, I enjoy reading through them, but then I can never get groups together nor find the time to create the stories I want to.
I just looked at the Savage World website and I'm digging the idea of their Plot Points campaigns.