Just a note on user images or avatars. If you click on Account settings in the upper right and then on Your site picture at the top, you can scroll down to a place to upload your own avatar or user image, personal icon, whatever...

Just use the Browse button to locate on your computer an image you want to use to represent you visually on the site. You can also visit AvatarsR.Us to download an icon of your choice to your computer which can then be uploaded to this site.  This is a free service with copyright-free images for you to choose from.

Icons or avatars add to the fun of the site, so pick an image and dress up your posts! (Oh, yeah, that's me with the baton over there...)