I have fond memories of the manager letting me play with the computers for hours. Our Radio Shack was in the mall and I'd drop in and start writing programs on the TRS-80 display models while my parents were shopping.

The manager not only didn't kick me out (like the manager of the bookstore always did if I looked at a book for more than five minutes), he'd come over and teach me some things when he wasn't busy.

That sounds like a great example of the difference between people who love their job and see it as an opportunity to meet interesting people, and someone who hates their job and just grudgingly draws a paycheck.