The Expanse series by James S. A. Corey (I'm rereading Leviathan Wakes for the fourth time!). I've actually talked about it here: I'm also a fan of John Scalzi's books. I can't remember how many times I've read The Android's Dream and the Old Man's War series. I enjoy Scalzi's humour and the fact that he normally writes sci-fi basically sealed the deal for me :)Currently, I'm re-reading Leviathan Wakes for the...fourth time. I'm pretty much going to re-read The Expanse series every time a new book comes out. I'll probably keep re-reading them after that. I like that it feels like a mix of everything on top of the scifi backdrop. It's by no means a literary masterpiece, but I love the series. Also looking forward to the show and also trying to curb my expectations for it :)
I actually just finished Leviathan Wakes for the first time, and immediately had to pick up Caliban's War. I absolutely loved the first book. Once I got to the part where Eros runs away I ended up having to stay up the rest of the night to finish it. My go to fantasy series would probably be The Stormlight Archives by Brandon Sanderson. I can't wait for the next one to come out so I can inevitably reread the whole series so far again.