I've noticed 3 different ways people handle shopping carts: 1) push from the front 2) pull from the back end and 3) pull by holding the side.

I'm a pusher. I can see where I'm going, and navigate around other people better.

I understand the pull from the back end way (ie you aren't pushing the cart into traffic when you can't see if anyone is there), but the pull from the side one baffles me. When someone is holding the cart on the side and pulling it, they take up the entire aisle so that no one else can get through. And I would think it would be harder to make the cart do corners in this position (maybe I'm wrong).

Which way do you handle the shopping cart and why? Particularly interested in hearing those who do #3 so I understand it better, and then I won't get quite so aggravated.