I've never actually finished Cross though I've started it probably north of a dozen times by now. The opening is just really lovely in its atmosphere... makes me want to just have a nice lie down in the sun somewhere. And at the time, its "What if" take on player choices (which weaves into the story as well) resonated with me big time. I first started thinking about moving away from home back then so there was a lot of hypothetical thinking happening, and somehow Chrono Cross made it feel like it was all going to be okay.

This is the specific piece of music I'm talking about: https://www.youtube.com/watch?v=xU5tQIDMAEw

Aquanaut's Holiday is a little weird, the original actually feels a little creepy in places in its dim lo-fi early PS1 3D and its weirdo ambient soundtrack, but I think it may have been the first non-goal oriented game I played so it has a fond place in my heart. Which one did you get?