There are pros and cons to both:
Side-by-side refrigerators
give you eye-level access to both the refrigerator and freezer and plenty of freezer space. But it’s not as easy to store larger items, and they aren’t as energy-efficient.
French door refrigerators
have aesthetic appeal and wide shelves, but you have to bend down to access the freezer. These fridges cost more than side-by-side models.