An instant messaging user may be represented in communications with other users by an avatar that is capable of being animated or may convey information about the user by displaying other types of self-expression items, such as non-animated icons, sounds, wallpaper, or objects associated with an avatar or wallpaper. In such a case, the avatar and self-expression items may have characteristics that relate to information that corresponds to or represents the user or their interests. The characteristics of the avatar and self-expression items chosen by the instant messaging user may be used to glean user characteristics or other types of information that describe the user in some way, such as the user's geographical location, occupation, and various hobbies and interests.