Originally Posted by auspex
And the other thing that you're still missing is that "Shelf" (in goodreads) has nothing (explicitly) to do with genre. In Goodreads, they are tags. I don't want all of my tags to be set in my e-reader as Shelves (as can be done with the Kobo driver) but I pretty much want all of my Calibre tags to be Goodreads shelves - but again, if you don't, you just don't map them.
I'm not "missing" anything when it comes to shelves vs genre vs tags. Nowhere does this plugin insist that a shelf has to be for a particular purpose.