Don't get me wrong, I get ecstatic when a movie clocks in at 72 or 85 minutes. Don't get me started on excellent short films. However, some people complain on the basis that a movie is 3 hours or so. I'm saying if all of that 180 plus minutes is essential not just to plot and character, but to mood and atmosphere then it is what it is. If it's good, it's good. Everything shouldn't be 100 minutes, ya know.
Of course, it's mostly impractical for most to set aside 3 hours of time uninterrupted at the theatre or even at home (which you can break up).