I think the nostalgic moments vary for all fans, since many of us became fans at a different time and saw different videos at first, heard different songs etc. What are the moments, songs etc. that give you a nostalgic feeling and why?
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I watched Maki's graduation concert last night and that inspired me to make this topic. Even if I became a hardcore fan only some time before Roman My Dear Boy was released, most of the videos I saw at first were from the period when 5th gen was still "undeveloped". The first H!P concert I saw was Kei's graduation concert and such. So, I can't tell why, but to me that "5th gen n00b era" is the one that makes me remember why I got into MM. I don't think too much when I watch those concerts or tv shows, I just enjoy the show. So to me videos and performances from that era are important and bring nostalgia.
And then to me, I think Koi no Dance Site line-up will always be the best. Koi no Dance Site was the first MM PV I had and the only PV I had during a winter when I didn't have Internet
So I watched that thousands of times. When I did get Internet, well, I saw Pinch Runner pretty early on and that also has the same member line-up in main roles. And then of course Sayaka's grad was the first H!P concert DVD I bought and it also has the same line-up. So yeah, I love that era, even if it lasted only for one MM single. Not that I dislike 4th gen or anything
Uh, I think there's other stuff, but my brother wants me to go play Mario Kart with him so I gtg.