I'm looking for sci-fi recommendations.

Hi everyone. I'm a great lover of sci-fi and fantasy books but I don't have anyone in my circle of friends/family that reads the kind of books I do. I was hoping to get some recommendations. I've read, Game of Thrones, The Discworld novels, Dune, The Hunger Games, The Golden Compass series and I'm currently getting into The Wheel of Time series. As you can see I've read more fantasy then sci-fi, but I would like to read some more sci-fi books. Any help would be greatly appreciated.