I used to grow up watching Danger Mouse, one of the most British cartoon shows. I still have fond memories of it and the dialog holds up well, acquiring nuance that went over my head as a kid, that I can appreciate as an adult. I learned about London landmarks -- Baker Street, Willesden Green, the Tower of London -- through this show, and even things like what a pillarbox is. Britishisms like that were always namechecked, and everything seems to have been made with a sense of British pride.
Danger Mouse got a "modern" reboot in 2015, and by comparison it's awful. It's more colorful and garish, the dialogue is more rapid fire and less funny, and though it sometimes features new landmarks like the Gherkin, it has less of a British identity. Later on I found out that the producers copped to making a more American style cartoon, which is what the market seems to want.