Do you guys think that having more space on the horizontal picture is better like this?
I think more dead, empty space is just as bad. This shot has about 25% woman and 75% out of focus background "stuff". I would try turning the camera so that it is framing mostly HER, using what is often called the portrait orientation, which will cause your shots to show a larger head-size and a larger face-size in each shot, along with less background. The overall result will be more-engaging portraits of this attractive lady.