Who have to write the first?

I certainly prefer when the girl makes the first step, after all that means she's INTERESTED in me )
Whether I answer or not depends on whether I'm interested in her or not.
The reason you get more answers when you write back to a guy who wrote first is simply that in that case, it is already certain that he's interested.
In other words, I live by the motto that no answer is an answer, too.

I think no matter who writes the first. We're now in 21th century and it's normal when the lady tees off. I don't take initiative in usual life, but here on the site I write men the first if I really like his profile. Women should write because of one reason at least: number of men is much much less than women. The man may not find your profile among big quantity of others. You can wait years Your man writes you if you don't make him notice you. On top of all that - nothing will happen to you, but you'' ll get more chances to find appropriate partner.