You should probably be just a little ashamed. Maybe not a whole lot, but a little. I mean, when you get to the stage of full-blown addiction, it's a little embarrassing, especially since it's not like there's some sort of chemical dependency other than the chemicals that you have trained your own brain to release.
You know, not to bag on you or anything, because I am clearly addicted to the Internet and message boards, and my MMO playing is just a sideline to that much larger and hungrier addiction. But I am, at least, a little ashamed of that. Not a lot, mind you, but still. At least I can stop whenever I want. *arm scratch*