What is the impact of Wally West's run as the Flash, and how did it change the character?

Wally West's run as the Flash (from 2006-2010) was highly influential. It shifted the Flash's focus from speed as a superpower to a more relatable, human character grappling with personal challenges and emotional growth. It also reimagined the speed force, giving the Flash a more dynamic and symbolic connection to the speed force.