We're Pathan, well mixed but hey-ho! I can trace our family tree back a far bit too.
I'm married to a Khattak pathan, who are originally from Bannu, but now his family is settled in Karachi.
When I was thinking of marriage I never outruled getting married to someone from where we originate from.
As others have said it's not just an area that plays a large part in someones behaviour/habits etc. Education, family influences and who you socialise with play big parts too.
My other half comes from a hardworking family, is educated and is a true gentlemen so I had no issues in saying yes to marrying him. His family also only have one wife rather than having multiple wives which to be honest would have put me straight off. I don't see any wrong with this practice, it's just not something I'd like to be a part of.