I never cease to be amazed at some of the photos people post as their profile shots on dating sites. Out of focus, flash flare, dark and that's just the good ones!
It really is worth spending a bit of time on taking a few shots, and deciding then which you want to show to the public.
Remember, it's not always love at first sight, but if you look unhappy and miserable in your photo, you'll probably get passed by. Dating sites are now so popular that you do need to stand out, so make sure your photo is good one.