We can restore our sense of national identity.
We still have a national identity within the EU.
Result: Bad
But, out of interest, what is our identity?
What makes the UK unique?
Historically it has been our involvement with other countries around the world (for better or worse).
Now it it looks like we will be leaving the Single Market as well, and that will make us more isolated.
So I'd argue, that if national identity is important to you (rather than being proud of your own accomplishments), then you don't want to leave the EU or the Single Market, as that will make us less important to other countries (why trade with us, with our own rules, when they can trade with many countries under a single agreement).
If you disagree, or would like to add more details, please let me know.
You can suggest a reason for leaving the EU, or look at the other reasons.