It started with my Curve a couple years ago. I've looked at literally thousands of themes, even tried my hand at creating them for a while, but I'm so OCD that I was never satisfied with what I made. I would spend hours surfing the net looking for the latest, greatest theme in my quest for the perfect theme.
Finally found 4 or 5 that were perfect for my needs, and slowly weaned myself from constantly surfing for new posts. Then the new plasmic was released and it started all over again!
Went back into a self induced rehab for a couple months, then bought a Bold and reverted back into my old ways. I'm finally settling down again, but I know that the addiction will always be in my blood.
Sometimes late at night I'll surf the web looking for new wallpaper just so I don't start looking for new themes.