This has been kicking around in my head for a while, and I think I did this on a past incarnation of the board ... let's take a stab at creating a "Mindset List" for today's fan of comic books and related pop culture. We begin by following the baseline that the Beloit College Mindset List uses, of a typical reader being 18. I know it's a dubious standard for this exercise, but we've got to start…