I mostly seem to use either "redbird," which isn't my real name or something people call me offline, and has the disadvantage that it's often already taken; vr or vicki when I can get them because I got there early or it's a relatively small site; and sometimes rosvicl, which nobody else ever wants and that a handful of people will recognize as me. (It was my username on the mainframe computer system back in college.)

And a couple of odd things in places where it seems to be the custom to use something that obviously isn't one's real name. I'm not going to identify myself, but Ask a Manager is full of regular commenters with handles that include movie and television characters, and a few in-jokes like "Guacamole Bob." (The site owner just wants people to use something other than "anonymous" and not to use sock-puppets, but is fine with someone changing their handle from, say, "Gene" to "Free Meerkats.")