I don't study film theory or anything of that sort but I like to watch films fairly critically. There has always been several things that stick out to me, like shot length, lighting and editing. Those are my favorite things. Except awesome displays of force, cool sci-fi stuff and amazing dialogue. A masterpiece takes hitting everything just right without major flaws. But I don't like writing off a film entirely for one major flaw, even if it is dialogue or plot, as painful as those two are when missing. Instead I try to look for what a film does right.