This is what works for me.
"Wow, you really have me curious to see if you have a personality to match your great sounding profile and your pretty face. Something tells me that you're probably getting about 50 emails a day from loser guys saying things like "Hi, I'm freshly divorced from my seventh wife, have 5 delinquent kids... but the good news is that I have a good chance at finally getting a job..." etc.
In any event, I have my life together, and I'm more than the usual amount of interesting and funny, so you'd better like to laugh. Lets chat and see what kind of friends we can make. Its all starts there after all. I look forward to hearing back from you."