@Goofy - "If I lived in Paris, I would visit the Eiffel Tower." is definitely not correct.

"If I were living in Paris, I would visit the Eiffel Tower"
"If I had been living in Paris, I would have visited the Eiffel Tower."
"If I had lived in Paris, I would be able to speak French."
"If I lived in Paris, I apologise. I don't remember a thing about it."

"J.K .Rowling always wanted to be an author." is referring to her in the past tense while using the word "always" - which suggests to the reader that she may no longer be with us in this world...

If this were written about me, I might be offended. Of course, context is key. Probably passable, because we all know that she is in fact an author now, so can assume you are simply neglecting to add "before she became one" etc., and if I knew that you were referring to a period of time during which you knew J.K .Rowling personally, then it would also fly.