McDonald’s is an anomaly amongst fast food in my opinion.
All fast food is trash, but I have the exact same greasy, salty, mediocre experience with McDonald’s every single time. No other chain has the same consistency between different locations. Its just a safe option every time.
For role play purposes we could add scars and stuff after particularly nasty fights, or maybe face paint/tattoos if your backstory imaginations involve tribalism and body art trophies.
Maybe if Larian feels like it they can have different npcs react if your character changed since they last spoke to you, like suddenly vibrant blue hair is now red