Few others you missed:
- A-chan awakened sexually to the concept of vore through video games, like Kirby. The concept of being absorbed by a bara BBM excites her, but only if its noncon. She hasn't really explored it as an adult and considers herself a more general M now, as you stated.
- Gura specifically likes being chased by the type of man you listed. She's heavily into the bratty/teasing sort of loli RP, where she forces an otherwise reasonable man to snap and overpower her. This may be why she likes Shion so much. She's also comfortable with appreciating the female body, and may also want to be smothered with huge breasts as above.
- Coco likes bimbofication as a subset of corruption, and frequently tries to emphasize the sluttiness or physical vulgarity of her body and other Holos, as a way to get veiwers to look down on them. Her first avatar was a crackwhore for a reason.
- Matsuri enjoys piss as a humiliation or edging fetish, but isn't into the diaper or babyplay elements that Marine likes to explore.
- Marine's favorite doujin elements has been stated to be gangbangs with ahegao and mindbreak. As you said though, she's fine with most standard hentai scenarios, like tentacles, hypnotism, drugs, yuri, etc. She's also the biggest fujo and shotacon in Hololive.
- Like her ID genmates, Risu isn't really comfortable with being made into fap fodder, but is internet savvy/HER enough to recognize such works as inevitable. She has requested that artists try to limit her pictures to solo pinups or toy play, if possible.