I've had a three year long obsession with System Of A Down, before them I changed my obsessions every five minutes, so far my SOAD obsession shows absolutely no sign of stopping. I don't particularly want to be obsessed with anyone else, I love SOAD too much.
I do listen to other stuff as well though, but I always listen to SOAD, and going by what I've heard of 'Mesmerize/Hypnotize' they should feed my addiction even more.