Visiting family warps your brain, study says - I always suspected this..
 

Proof that family can drive you nutso faster than anyone else

Visiting — or even just viewing photos of family members — prompts brain activity that affects how you feel about them, your friends, and even yourself, a new study suggests.

The study is the first to compare brain activity associated with seeing relatives with that linked to seeing friends and strangers. It suggests our feelings about biological relatives are at least somewhat primal.

http://www.msnbc.msn.com/id/28423178/

that explains so much! everyone in the world gets along great with my mom for extended periods of time, except for me.