Alright, I thought I'd pop into this thread again since something came up that was pretty relevant. Here's an incoming ramble that I hope can sum up the idea of nostalgia for me.
My boyfriend and I were taking about Sun and Moon (He's not a big Pokemon player but he's played some of the more recent games) and I told him I'd always just leave my game open inside Hau'oli City because I loved the music. I'd listen to it in class sometimes because I'd either be playing SM in my downtime, or listening to the music while working. I had a lot going on in my life at that point and it was something to help me relax, I got super into those games and played them whenever I had free time. When talking to him I sorta just remembered how good it felt and how much I enjoyed my experiences when the game came out, the friends I talked to about it and just the way it looked. It was a game where I really enjoyed all the locations and sometimes would just go to an area cause I thought it was pretty and feel like I was in the game. I'm listening to that music now and it's sorta bringing back how I feel. I definitely miss it, in a way, and a part of me wishes I could have those experiences back.
We continued talking, and it got to a point where I mentioned a point where he was playing Platinum with me, and I cried for a while hearing the music for the Pokemon center at night. I played Platinum a lot when things got really tough in my life, and I'd stay up late (for how old I was) because it was my getaway from everything. It made me super happy, and hearing that music again when he was playing it with me reminded me of that and how I got through it all. I'm a pretty emotional person and cry at a lot of stuff, though I think that was something really special, and something I'm sure I'll think about for my whole life.