I used to hate it, when I lived in London, when people referred to me as Londoners. (Actually there was someone, whom I won't name here, who used to regularly wind me up by referring to me casually in conversation as a Londoner, until eventually she took pity on me and let on what she was doing.)
This had a lot to do with the way that Londoners, and London Jews in particular, would act as if London was the be-all and end-all of British life, and the rest of the country did not exist. As a Novocastrian, I took umbrage at this.
For some reason, though, I never had this hang-up concerning identifying as a Berliner. Possibly the fact I never had the experience of living in the provinces in Germany had something to do with it, but I think it's more that Berlin from my perspective (which mostly means my workplace and my synagogue(s)) is much more cosmopolitan than London: Most of the people I know here came to Berlin themselves, or failing that, their parents did: Multi-generational Berlin families—people who speak the Berlinerisch dialect—are few and far between in my circle.
I felt I wanted to express this. So I made a sweatshirt (click through for higher resolution):
Explanation for non-Berliners/non-Germans: The text of course plays with JFK's famous "Ich bin ein Berliner", but the addition of the "geworden" changes the meaning from "I am a Berliner" to "I became a Berliner". The bear I am dancing with is the state symbol of the Berlin. The I in "Berliner" is a silhouette of the TV Tower, which for me acts as a symbol of Berlin as the city I live in (the Brandenburg Gate being more a symbol of Berlin as capital of Germany). And the Union Jack in the background I have altered to be in the colours of the German flag to show both where I have come from and my successful integration into German society.
Lastly, the back of the sweatshirt reads "Und du?" ("And you?")—Originally posted on Dreamwidth, where there are comments. Please comment there using OpenID or a DreamWidth account (which you no longer need an invite code to create). Though I am leaving comments enabled on LiveJournal for a bit, please don't comment here if you can do so there instead.