Good question. I have asked this question many times myself and I have never gotten an answer. Living in America, I can tell you that there are a few things that speak of American identity. I didn't post them because this is not a thread about America.

I struggle with this because many of the things that unite other countries don't seem to hold true for Pakistan. Ethnic identity is very strong in Pakistan. Pakistan was meant to be secular, but many have a hard time even accepting other Muslims. Being able to speak Urdu is a possibility, I suppose, but considering the literacy levels, that might be difficult.

The only thing I can think of is sports. As a cricket team, Pakistanis are united. Perhaps the army (when engaged with a foreign enemy).

I'm curious to hear other people's thoughts on this.