Just picked up my first snap-collar shirt (hidden snaps holding down the collar points) today and am wondering about the formality of this item. It basically looks just like a straight-collar shirt but the snaps hold down the points like buttons on a button-down. Question: Is this shirt more informal like an OBCD or more formal like a straight or spread collar? I'm guessing it could possibly be either one. Also, this shirt is from Nordstrom (got it at Last Chance) but what other makers have this type of shirt? Is it more common than I realize?