Source:dc.wikia.com
9. The Origin of the Flash’s Masked Identity
(Flash #128)
I'll be honest. This one isn't much of an imaginary story, it basically just exists to show how much of a loser Barry Allen is.
The story is a flashback (pun intended) to just after Barry got his powers. He's deciding whether or not to wear a mask as the Flash, so he daydreams about what it might be like if he didn't. In his daydream, he just holds a press conference and tells everyone he's the Flash (not sure how police scientist and whitest man on earth Barry Allen got ANYONE to come to his press conference, but whatever). The next day, a bunch of people swarm Barry at work, which almost makes him miss an art heist.
He doesn't miss it. But he ALMOST does. And that's enough to convince Barry that he needs a mask.
The thing that convinced him to wear a mask wasn't the safety of his friends and family or his own privacy, it's that it would make being the Flash mildly more difficult. MILDY. Barry's such a loser, but that's why I love him.

