I love the classic black & white Nancy Drew films, but found Nancy a very whiny young lady. In the new version, that I watched last night, Nancy is a much more grown up young lady. I was impressed that the characters actually looked like teenagers. Nancy seemed very secure in who she was and in her desire to solve mysteries. Who doesn't like to know the answers? Working at a library, my innate curiosity helps keep my job interesting, so I can understand her drive to figure it out.
I recommend the movie, just don't take it all that seriously.