I only get them if there's some in-game stuff. If all it includes is a "behind the scenes" or "how it was made" or anything on those lines I completely ignore it as useless junk. I don't care much how it was made or who were the faces that did it, all I care for is playing the game they worked to make. If I get an extra bonus for collectors edition then I may be inclined to buy it as long as the extra price is worth the extra content, which normally is even as a useless thing for fashion or anything like that, just adds a little color to the masterpiece... or a small fly to the huge fecal matter.