Taylor Swift is a great artist.
Not many people can switch from country music to general pop music like she did.
Agreed!  She made the transition seem effortless.
Well winning a bunch of grammy awards and having a large fan following means you can almost do what you want, really.
Many have tried to do what she has done though and failed.
That's especially true about her songs which concern her personal life.  Most artists would get a "who cares?" response.  Not her.
She has turned breaking up with lovers into pure gold!
She has encountered some criticism for involving her personal life with her music though.  I mean, wouldn't this be essentially using pop music to bully people?
Possibly, but her songs have become anthems to all who've had their hearts broken.  
You can't argue with success, I suppose.  Her album "Speak Now" debuted at number one in the U.S, so I guess the market has spoken.