Signup for a free service called Gravatar
It doesn’t take even 1 min to signup and it helps a lot. Do it once and it’ll be applied to all the forum posts you have done so far on various forums online.
A Globally Recognized Avatar
Your Gravatar is an image that follows you from site to site appearing beside your name when you do things like comment or post on a blog. Avatars help identify your posts on blogs and web forums, so why not on any site?