The greatest appeal in making these boxes yourself is that you get to make it personal. It won't just be a box, like all the others that are discarded once the gift is taken out. The way you choose to decorate your gift box can convey a lot to the receiver. You can write on it, add pictures to it, share an inside joke or two, and make the gift giving experience personal and special. While all the other gifts came in generic boxes, yours alone will be unique.
Making your own gift box gives you a lot of freedom. You can decorate it however you wish and you can customize it according to the taste and likes of the person receiving your gift. This will make the box almost as special as the gift it contains, while at the same time adding a lot of sentiment to it to make sure that the receiver knows that you put a lot of time and thought into it because you care so much about them.
You can create these boxes out of almost anything you find around your house. Most tutorials on the internet will teach you how to use a cereal box to make a gift box. But depending on the size and shape of your gift, you might need to get hold of other cardboard boxes.
This is much cheaper than buying gift boxes from stores as you are using boxes that you already own to make them, and you can decorate them without spending lots of money as well.
An added advantage is that you are doing your bit to keep the Earth green by recycling paper. If the receiver of the gift is a nature lover, then your best way to show that you know and care about their passions is to make your own gift box.