I think you were doing something wrong on Borderlands 2 because you can totally get through it in like 4hrs, excluding side missions and dlc. And thats on the hardest mode.

I love long games, the longer the better and tbh I've been thinking that games have been getting shorter. I was super disappointed when I'm taking my time on a game and it suddenly ends 3hrs in, looking at you CoD. But I've never been one 100%-ing a game, I just beat the main story and try and get the best gear along the way.