My real journal's purpose is to let the world see what's going on inside my head. What happens to me, what I think, what I feel, etc. Internal stuff being exposed to the external world so it can understand me better.
My livejournal was formerly only used for posting those stupid tests everyone does. But I've posted a couple other things to it, like a horiscope I thought was particularly interesting. So, that journal is for taking the external, and echoing it back for the rest of the world. Quiz results, horiscopes, forwarded tidbits, etc. Yes. I think this is a good idea.