I wish there would be an option to indicate if you are a guy or a girl in your profile. Somehow, people always assume that you are a guy - unless user name and/or profile picture are very girly. It's not a big deal, but I think it would add value.
It could be a voluntary thing, but for those choosing to use the option it could show up somewhere next to or under the user name. Just like the area you are from.
What do you guys (and girls) think?