Yes, alternating sides when creating a balloon garland is a common practice and is highly recommended. This technique ensures that the garland has a balanced, full appearance. By alternating sides, you're able to create a more organic and appealing shape, as it prevents the garland from leaning too heavily to one side. It also provides an opportunity to mix different colors or sizes of balloons in a harmonious way. However, the pattern of alternation is not set in stone and can be adjusted based on your personal preference or the specific design you're aiming for. Always ensure that the balloons are securely fastened to maintain the structure and longevity of the garland.