[s1e15] Game Night -

: It justified Barney's seemingly ridiculous character by giving him a tragic, grounded backstory.

: Flashbacks reveal that in the late 90s, Barney was a soft-spoken, idealistic environmentalist planning to join the Peace Corps with his girlfriend, Shannon. After she leaves him for a wealthy, suit-wearing businessman, Barney undergoes a dramatic transformation, adopting the "suit up" lifestyle and the womanizing persona he maintains throughout the series. [S1E15] Game Night

For deeper insights into the writing process, including how Barney's transformation was inspired by Darth Vader's origin, you can listen to the How We Made Your Mother podcast hosted by series creators and cast. How We Met Your Vader | S1E15 "Game Night" : It justified Barney's seemingly ridiculous character by