I agree with Tavrobel. I think the overall tone of Final Fantasy X and Final Fantasy X-2 will weigh in others' answers.

Yuna sponsoring a concert at the Thunder Plains seemed too cheesy to me and its preparation and execution took up a large majority of what was considered a chapter in the game; conversely, Tidus and Yuna at the spring in Macalania Forest was an unexpected tender moment shared in the course of an uncertain adventure while not becoming a large plot point in itself.