A matter of quality over quantity! You want to give people an idea of who you are, what motivates you to travel and where your favourite places are. Anything that helps build up your author personality will help. You want people to remember who you are and come back and read your articles.
We don’t mind what picture you put up – as long as it isn’t rude or offensive. Choose something that reflects you and shows a bit of personality – making you stand out from the crowd will make people want to read what you have to say.