I seem to get flagged for additional screening more than the average bear. It isn't every time, but it seems like more than most people. I'd say I fly once every 1-2 months and it's usually either SFO-PIT or to other places in/around CA. I don't take one way flights often but I have a few in my history, as well as last minute purchases (sometimes we decide to go to San Diego or Vegas at the last second!). I always figured it was that, but someone told me that because I have an extremely common last name (most popular in the US, go ahead try to stalk me), that is cause for common additional screening. I know it's not a match with someone on the No Fly since it doesn't happen every time, so what else could it be?