I've been watching all of advent for 4 months now. I've consumed more than 500 hours of advent streams. Here's what I feel
tl;dr I like all of them but if I had to suggest them to people (I'll only focus on the good / neutral things):
>Fuwamoco: watch them if you like the classic vtuber experience, cute noises, boomer taste in vidya, very light hearted streams, extremely professional and reliable, no heavy topics
>Biboo: watch her if you like the daughterwife experience. Absolutely bottomless positivity, reliable gamer (actually finishes games), spends a lot of time with you, streams a lot, cute and funny (actual little girl energy), very reliable collab organizer despite being a kouhai, kinda like Koyori in that regard.
>Shiori: tangent queen of the gen. This bitch doesn't stop talking, and holy fuck she says some weird shit. Cute mannerisms, treats her fanbase as individuals (can be good or bad), thinks out of the box for content
>Nerissa: the hot white girl experience. Down to earth topics but also some weird stuff and obsessions. Twitter brainrot, amazing singer with an unique skillset. I want to fuck her brains out