You go to all that trouble to elaborate numerous categories and subcategories of people and that's what you get for your first comment? Life is harsh!
Well, there's some interesting detail in those categories (along with some boring humor — e.g. "a $4 half-soy-half-decaf-latte-with-a-shot-of-pretention").
I found that 7 types of bookstore customer post via an Ezra Klein tweet. Ezra parks himself in the category "Browser."
I think there's an 8th category, into which I'd put myself. "Reminiscer." This is someone who used to hang around bookstores all the time and leave with a pile of miscellaneous books, but now drops in only occasionally, looks around, and remembers when she didn't spent nearly all of her reading time on line. Now, all those book covers look like front pages of websites. She might click on a few — i.e. open them up and read a few lines, maybe even a few pages — and then she contemplates the way she used to feel that she needed to make these blocky objects into personal possessions and proceed through them systematically, front to back. Then she shakes off that reverie and goes somewhere else, somewhere where the WiFi is free.