Thoughts on Saints Row the Third DLC? Does any of the DLC alter the main game in any way?

I bought the franchise pack during the summer sale and it's still sitting in my inventory. I also bought the THQ Humble Bundle yesterday and I BTA. Which means that I now own one copy of the game with almost all the DLC, and I own one without any DLC. I plan to activate one copy on each of my steam accounts. But I'm trying to determine which one I want tied to my main account.