The runner always appeared to me as a Whigger-type who listens to Rebelmusic.
Rebelmusic. Ha. Ha. Ha.
And the constructor seems much more playful.
It's the dance, isn't it.
Or even the Firebug- in TF2 (s)he seems at least somewhat laid-back, between the air guitar and the videogame and movie references and all that jazz. GG2 all you've got is a nonsensical maniac whose

taunt bubble doesn't even make sense.
I couldn't help but think of our Runner as some guy from Brooklyn or something (rather than Valve's supposed Boston), the Healer actually gave a damn about his patients, etc.
You see, Soup? Now you've got me massively over-thinking useless stuff in some poor soul's sprite art thread. Way to go, some hero you are.