Disagree on the voice thing honestly but I don't think there's anything wrong with her either. I just don't see what makes someone go see her in a movie. She's so boring. She just looks and sounds bored and monotone in almost every single one of her movies.
I didn't see Under the Skin but from what I read about it she's very emotionless in that one too, isn't she? I actually completely forgot she was in Don Jon, I did like her in that. Otherwise though I just feel like Emma Stone, Jennifer Lawrence, Emma Watson, Natalie Portman, etc. are much more engaging and likable on screen whenever I see them, although I never really followed any of their careers. I do want to see Jackie though.
I do appreciate the thought out response though. I guess it'd be better to say I understand logically what draws people to her movies, I just really don't feel that way myself and the dissonance there feels weird to me. I've liked her in Don Jon, Her, and thought she was fine in Lost in Translation (although Bill Murray was the real draw to that), but going out of my way to see Scarlett very likely play the same boring, monotone character she does every time? Crazy to me.