This is pretty similar to my own methods.I look at reviews on tobaccoreviews.com (particularly JimInks) and also go on the advice and opinion of forum members. After a while you begin to recognize members who have similar taste/palate/preferences. That and experience with the blender's other stuff weigh in heavily.
So, you grow your own?I use three criteria: 1. No toppings (casings are okay) 2. Straight Virginias and/or Burleys only traditionally cured (no orientals, latakias, etc), 3. either sourced in the US, blended by or for a US company to support US businesses. Pretty simple.
Whatever JimInks says, that's what we smoke. I know it, you know it, everyone knows it. However sometimes I wait a few weeks just to enjoy the illusion of free will.