I’m a pretty particular person when it comes to books and movies. Especially when it comes to series. I like stuff to match. This means similar looking cover designs, same format, same styling, etc. I waited almost a year for Breaking Dawn to come out in paperback because I already owned the rest in paperback and they had to match.
I really dislike when an author or production company makes significant changes throughout a series. My Harry Potter DVD set has 3 different types of cases and it drives me crazy. My Shopaholic books by Sophie Kinsella have 2 different designs. And I just saw that Pandemonium by Lauren Oliver has a different looking cover from Delirium.
So that consumers spend more money.
I wish I could afford to buy box sets and have everything looking all nice and neat, but I hate to waste money. Especially when I already own what I am buying. I know that I could wait for a series to come out in a box set before purchasing any, but who has that kind of patience? Not me. It took 10 years for the Harry Potter Books to come out. No way could I have waited. Plus some series don’t have an exact number of projected books when they started, i.e. Charlaine Harris’ Southern Vampire series. (This is how I got fooled with my Die Hard DVD series. I bought the box set. Then they came out with the fourth movie.)
I wish that you could get credit for turning in your old copies of books/movies when buying a box set. That would be the only way I could justify spending money on something I already own.