Definitey don't feel pressured to listen to all of it, I was just too tempted by the act of list-making. It'll be great if it's even a little useful.
- It makes me especially happy you've already heard the "Shugo Chara" groups/music. I shouldn't be too shocked, I think for a while that was the introduction to H!P for a lot of fans; you were so young though, that's so cute!
- Matsuura's early MVs are all a little odd.. but so are the songs. I heard them a lot when I was first getting into things and devouring those concerts.
- The SHUFFLES. I love the shuffles. Even the ones I didn't list I still like. You plucked out some really great first listens with those three. (Speaking of the shuffles, I've wanted BEYOOOOONDS to cover 11WATER's song for a while now so I hope you end up enjoying that one too.)
- "Anataboshi" is amazing. That bagpipe + tambourine combo should never work but somehow it's killer and such an energy booster, and you absolutely should listen to every one of the "Kirarin" anime songs! Kirari-Koharu, MilkyWay, and Kira*Pika were all great. Even I have to admit though, some of those Kirari-Koharu b-sides and album songs are kind of weird. I unironcally enjoy "Hatten×JOY", but it took me a few years to get to that point.