I was with a bunch of people checking in for a Korean Airlines flight (I believe it was Anchorage to Seoul). Everyone had tons of packages including regular bags. The screeners would frequently have to open a bag or box. One of my friend's bags were hand checked while the other wasn't. The screener volunteered that it was because of sugar. As soon as he found the food product that had sugar, he quit searching. Does that make sense?
My bag almost always gets checked too so they must not like Alaskans. Maybe it hasn't something to do with the woman that put a loaded gun in checked luggage on her way back to Eagle River (Anchorage)?!