I agree. It seems like you never get enough oomph from an engrossing session of WoW - never really satisified, always feeling empty after the latest chapter/quest.

It's kind of like reading a Robert Kiyosaki book - getting to the end and needing to buy the next book right away. The content makes you feel good but it always leaves you feeling a bit undernourished, hoping the next fix will finally complete you - leaving you whole.

The preceding was a bit of self-reflection, perhaps. :)