FFX: The opening scene, The Sending, The Spring, The scene at home when (SPOILER)tidus finds out that yuna will die after the final summoning, the ending, Most of the scenes at bevelle

FFX-2: 1000 words concert, Yuna's Dream, and the Good Ending (the one where (SPOILER)tidus and yuna reunite and live happily ever after)

as you can see i'm being careful with spoilers anyway