My last read of 2015 was The Stand: Captain Trips. I've read The Stand previously, but long ago enough that I don't recall all of the details. I really enjoyed this, and will probably read it more than once, taking more notice of the artwork etc. There's a section at the end showing some of the character and cover artwork, and it shows the thought and time which goes into it.
I've read books 'translated' into graphic novels before, the two which come to mind are The Amulet of Samarkand and Interview with the Vampire: Claudia's Story. With the first one, I knew the story well, and I particularly like the humour in it. The graphic novel format felt very stripped down, and the humour didn't come across so well, so I wasn't keen. However, I hadn't read any of Interview with the Vampire, and I felt the graphic novel told the story very well (and the art in that one is gorgeous!). On the whole then, I feel as if graphic novels can be a good way of reading a story - maybe introducing to a reluctant reader, or to enjoy the artwork involved - but are probably not so good if it's a story you already know well. With The Stand, I'm removed enough from the actual book to enjoy this new format.