vocal synths<3 i used to listen to at least 1 unpopular vocaloid song a day, and even though ive been too busy to keep that up recently id recommend doing it
id recommend idono kawazu's songs to anyone who enjoys unique tuning (though their non-vocaloid works are great too. those high notes!) :] their music videos are fun as well, they have a delightful ink-drawn artstyle and most of them even have (albeit janky) english subtitles. crawling spirit, wobble of the pomegranate and sour grapes are my favourite works of theirs (i LOVE their vflower tuning)