I have started collecting the WoW trading cards. But I don't know if the raid decks are worth buying. I bought a couple of Arena Grand MeLee and was dissapointed to find only a few cards with pictures. The rest were blank and for people who really do play the game. So, I just want to know if the raid decks are like that? Are most of the cards blank and only have a few with pictures?
I guess I should have added that I have about all of Heroes of Azeroth, The Hunt for Illidan, Through the Dark Portal, Drums of War, and Blood of Gladiators. I am only missing a few cards out of each set. I will also be getting a bunch of Fires of Outland.

So, my question really is what is inside the raid decks?

The raid deck comes with 2 things. Most of the cards have pictures but are only for a raid deck and can't be used in a regular deck. There is a treasure pack in each one consisting of very good rares which you can use for your decks. If your new though I would go with the Starter Decks which give you the cards you need to build up a new deck.