Online dating services are all about how to portray yourself online through a appropriate photograph of yours. Some people do not intend to send their photographs may be due to certain personal reasons.
This is not at all advisable as reluctance in sending photographs may be considered as an act of concealment. Moreover, the photograph you are sending should be clear enough to give others a complete idea about your personality. Always try to make your first impression the last impression in an absolute positive way. It is preferable that you are alone in the snap with no other associate hanging around you.
For an additional dignified or attractive appearance, there is no need for you to dress yourself up differently by applying excessive make-ups or wearing something awkward. There is no need to expose. Never try to hide your reality.