Patriotism is overrated. To be proud of your geographical heritage is nonsensical.
Great Britain is a great place to be/live, regardless of where you were born. We are at the pinnacle of human development as a species, and Britain is one of the best places in the world to live it. We have the best technological development in the world, we have the best state health service in the world, and we have a welfare state which, while heavily abused by many, is among the best in the world.
Our streets are relatively free from crime and disease, we are among the richest nations on the planet. We have a rich culture of history and art, and a beautiful, green land that is the envy of the world.
Yet the British people are a bunch of miserable horse vaginas.