I've noticed quite a few members that have joined recently (and some members that have been so for longer periods) have not personalized their profile picture.  Using the default profile image is okay:

Those are some nice horns, but take a little time and you can break from the herd with your own image. 

If you look in the upper right corner you'll see your screen name.  Click on the arrow next to it and select Profile, under Content.

On your profile page, you'll see an icon to change your profile avatar.  I have included a look at mine below:

The highlighted picture icon is how I added that BRAHMANS logo patch as my avatar.  There are multiple choices to add your own avatar, including the two most popular, adding via a URL (image already hosted on the internet) or uploading from your computer.  Both work just fine.

Try updating your profile picture and give yourself an image others will come to recognize you by.  If you have any questions or need any help whatsoever, please reply to this blog entry.