Back here just to make a few comments.
Taylor has style for sure. Specifically I love the ensemble she wore at the 2015 Billboard Music Awards. But I think if that can be linked to anything it's possibly to 3 - her outfits are conventionally appealing but not boring and her new music is pop but not sugar-coated annoying bubblegum pop. Taylor is smacked right in the sweet spot between what's popular/well-liked and what's impressive/respectable (and no these categories aren't always or even often mutually exclusive) and, personally, I have a feeling she knows it. Like @chickpea said she's a very smart businesswoman and she definitely knows how to market herself. Obviously this isn't all to say she doesn't have as much substance as the people I mentioned above as every type of style has merit, but Taylor's seems more out of preference for wanting to be received positively by others.
Side rant, my one problem with her is that her new feminist image seems to be only an image. From defending Lena Dunham to not acknowledging racism against black women after Nicki Minaj tried to point it out to her, she can use "supporting all girls" as a blanketing tactic to cover up real issues that feminists are trying to talk about. But I am sure she's well-intentioned so hopefully if she keeps lending an ear to feminist issues she'll learn over time who she should be defending and supporting and who she shouldn't.
And to me this actually seems more like a Pe sentiment (in this case, Se) than Ni...which is funny because I'm the one who doesn't think she's a Pe-dom. But if anything says spontaneous, free-form creative processes to me it's Pe.Ni (likes the spontaneity of the song writing process, starts to flow easily once started)
Putting aside the fact that lots of people write movies, music, etc about their own individual circumstances, if anything this seems more like Si to me. I think @EJCC said to me recently that country music itself is very Si as a genre and it makes sense since it's almost entirely about the meaning attached to past experience and how they affect the present.Fi (individual circumstances are her songs, responds to those who are hurt individually)
I mean, in the end we have no real way of knowing Taylor's type but I stand by ESFJ for her. Sorry if this is basically all blabble but those are my thoughts on her and ESFPness.