Generally, I use some degree of offset for almost all my pictures, but sometimes, I just want that shot right in the middle. It turns out to be harder to accomplish than one might think. Sometimes, your lens isn’t the right length or there are physical constraints — doors, pillars, and other immovable objects that won’t let you be where you need to be to get the picture. Software isn’t always able to make up the difference. All of these were intentionally centered. If they aren’t dead in the middle it’s because I just couldn’t get that angle.