Weed Journal... what are some characteristics you would keep?

There are wine journals which keep track of various wine characteristics for one's later reference. What would be some things you would note if you were keeping a weed journal.

BTW, is there already a standard established for judging weed? What are the common traits one could use to objectively describe all varieties?

I envision some day being able to go to weed tasting events just like one visits winearies today.