Not shown: two double panels of The Rolling Stones on stage, a BIG gigantography covering all the roof (from the inside) of Maradona, and a lot of small curtains and trinkets of Boca Juniors in the front.
Best one I can remeber? The dude with a fake "minibar" of alcoholic beverages next to the drivers seat, and a LOT of fluffy interiors, like you know teddy bears with long "hair" ? Yeah that but blue, everywhere. And carved mirrors, these dudes love carved mirrors for some reason.
Also frequent: little and not so little fucking altars to a miriad of small deities like saints or Gauchito Gil, Gilda, Difunta Correa, Maradona, etc
Also related: Check "fileteado porteño", formerly very popular in buses.
A very representative one shown here: https://youtu.be/qV8up2rQ20I
Edit: Holy shit it has its own wikiepdia page https://es.m.wikipedia.org/wiki/Colectivos_de_Buenos_Aires#Objetos_ornamentales Check the whole article, very cool
That is awesome. Our drivers only creative freedom is during sports time they can change the marquee to read "Go Lakers" or "Go Dodgers"