Internet dating is tough indeed and not much different than the real (physical) thing. You need a hook, an angle, something to entice. Personally I refrained from showing skin. This turned out to be a poor strategy as my 'hit' rate was something like 5% (those who responded to my outreach). Instead of the usual bla bla I resorted to quick comical commentaries which also included a tactful compliment. This recipe greatly improved my hit rate and eventually landed me a girlfriend which was my goal. My advice would be to make your e-mails short, witty, complimentary, and insightful. Also send out lots of them. Don't get too picky. You can't tell much on the front end so give people a chance. I know I got pretty lucky but it's like fishing.