If you like fantasy I would recommend the Inheritance Cycle series, if you haven't read those yet of course. They're some of my favorite books. I would also recommend a book called The Sight by David Clement-Davies.
In a serious recommendation, I totally agree with these! I'm a huge fan of fantasy books so big you could knock someone out with them. I'm actually craving to reread The Sight, it's at home on my nightstand and I've decided to read it after I finish my current book.