I got stuck on 50 Shades, and personally I think I made it an impressive way through considering how badly written and repetitive it is, and the fact that nothing bad happens.
I'm so ashamed about this, but I also got stuck on Tess of the D'urbervilles. Having loved The Mayor of Casterbridge I thought it would be good, but just couldn't get into it at all. I even watched the BBC adaptation and it didn't help. I think it's possibly because I don't like Tess as a character at all.
I keep trying to start Jean Auel's final book (The Land Of Painted Caves), but I just can't get into it! I purchased the book pre-order over a year ago and still can't get past the first pages! I LOVED her first two books in the series ("Clan of the Cave Bear" and "Valley of the Horses")..in fact, they're my favorite books of all time. But my oh my, each book got progressively worse after that. What happened???