I hate paying for shipping. If a website has a corresponding store I would rather drive to a couple locations to find an item rather than pay shipping. I occasionally find amazing deal that I pass by because they cease being at deal when I add on the extravagant shipping price.
This is even worse when I have to order something I am not sure will fit or will be a nice material. This means I may have to return the item, which often means more shipping costs. It takes a lot of convincing, or the perfect item to get me to pay shipping. I will search for free shipping codes. I will buy dollar items if I only need to spend a little more for free shipping (as long as this costs less than the shipping would).
Shipping is a save for me. I hate spending the extra money. Are shipping costs a deal breaker for you? Or do you pay more attention to the item and your desire to have it than the cost of shipping?