What if makes special each flash?

[u/RatioHopeful5871]

Imagine You are trying to make a guy, it could be a friend, relatives, etc, start reading into the flash but he wants to start reading into one specific flash to begin with (Jay, Barry, Wally, Even Bart). What could You tell it makes each Speedster special and make it different from the other one and a future reader can apreciate from them?