Stumptown is not Portland, Oregon's only nickname. It is also known as PDX, Rip City, Rose City, Bridge Town, and Bridge City. The name Stumptown comes from the stumps left by the thousands of trees cut down to make way for the city.
Dex's Mustang has a tape stuck in the player as did Marshall Eriksen's beloved Fiero in Cobie Smulders' previous hit series "How I Met Your Mother" the difference being Marshall's tape only played "I'm Gonna Be (500 Miles)" by The Proclaimers but Dex's fires off random (but amazingly apropos) tunes from a mix tape.
In the graphic novel series by Greg Rucka, Dex Parios is a down-on-her luck private investigator, bisexual, and gambler indebted to local casinos in and around Portland. The television series adds that she is Marine veteran suffering from PTSD, two traits which are not at all mentioned in the nineteen issue limited comic book series.