I got to the Goldenrod Takeover in HGSS and I'm wearing the uniform and almost every single character has different dialogue based on you wearing the uniform.

Even a guy mentions how professional the Pokemon Center and Department Store Clerks are, serving you the same even though you're from Team Rocket

And the WiFi Plaza lady says she refuses to serve you while you're committing illegal acts.

Man, I just fucking love the little things they added to make this place feel alive.