Why should I include a photo?
By including a photo on your profile you're over 5 times more likely to be viewed and much more likely to be contacted or replied to. Think about when you search, do you tend to click on the people with photos or without? Many sites now let you add several photos and you can use these to show something about you. If you've pictures of you traveling in different countries or interesting places, taking part in some kind of sport or just an amusing photo of you they will create much more interest than your passport mugshot.