Do you manage your kindle books in Calibre?

With my Kobo I used Calibre to convert bought kindle books to EPUB. I also used the Edit Metadata window and added a Tag for its genre, added the Comment (copied from Amazon's page), and set up its Series info if it was in a series.

I now have a Kindle ereader and I'm wondering how to manage its books. I do all of my book ordering from Amazon's web page and have it send it to my Kindle. When I connect the Kindle to my PC I can send the book to Calibre but the book itself is in KFX-ZIP format, which is unusable. I can make Calibre remove that KFX-ZIP file since it's useless, but do as before and edit the book's metadata the same as I did for an EPUB.

So now I can use Calibre to look for books by genre, series, etc.

What other things could I be using Calibre for for organizing my library and managing the books?