Help! I need your opinion on a name for my character.?

I have finally started writing the story I've been keeping down in a notebook since I was in a highschool,it's still in a very rough draft stage.But before I officially start I wanted your opinion on what my leading lady's name should be.It is set in a modern day setting,and I wanted to know what name sounds more attractive to you,Sadie or Livy (Olivia).I'm also open to suggestions with an explanation of why the names are y,appealing,or whatever signal they send you.Thanks.