I'm very much into the world that Michael J Sullivan has created with his two Ryria and Legends series. The next book is kind of far out now.
Same with Sanderson. I think it's cool that he's tying multiple magic systems together into one cohesive universe.
The opposite answer to this question is Patrick Rothfuss. I hate hearing about him releasing anything new, because I know it isn't going to be what anyone wants. I also dread him actually, finally, really releasing the 3rd book that people have been waiting for... I will be in a real battle whether to actually read it. Will my spite plus hatred of half the 2nd book win out over my love for the first 1.5 books?