I found this quiz on Ravelry... and thought you might like to give it a whirl.
According to the results, I am not addicted! Clearly I need to knit more.
I am also adding links from the same blog for the Yoke-u-lator (a program to create patterns for circular yoked sweaters), and the Calculator (a small program to calculate numbers of stitches between increases, when a pattern says: increase evenly. Scroll down to Feb 19th blog entry).