I am without a doubt a big online-shopper and I get a lot of stuff from Amazon. I prefer to use the UK site because they offer free delivery to DK for any order over £26, the delivery is normally 3-4 days after the order has shipped and there is no additional charge as it is within the EU.
I get a lot of DVDs from there, mostly because there is a lot a money to be saved. Take for instance the first season of US show Once Upon A Time. This DVD would have set me back DKK 399, which is about £42, but I ordered my copy on Amazon and in total paid £24,16. So it is safe to say that I <3 Amazon :)