I've never heard Plus Boy before, those nsfw sounds actually scared me, I got like the small stabbing feeling of dread yk. The "kawaii, kawaii" and "yamete" wtff x( But maybe it's not as dark as where my mind went
My fav prsk miku is l/n or n25 miku! But in general it would probably be rolling girl miku, my fav vocaloid (using it as an umbrella term for vsynth) is kafu and kaito!!!