As an avid dater, online and off, and as someone who used to work for Dating Coach Evan Marc Katz, helping clients write their profiles, I saw many common online dating mistakes. A lot of people clearly didn't know what to write in an online dating message. For instance, the more specifics you have in your profile , the more your future partner can ask you about. A study by the University of Iowa has similar advice. According to this New York Times article from February, , one in 10 Americans is signed up for a dating site , the most ever. Anyone can say they dance or read, but what kind of dancing and what kind of books? I also have a backlog of Atlantic s to get through, but I might not win that literary battle.