I can find examples I love and others I hate for all of those styles. However I mostly seek extreme/bizarre fetish art which is why I voted 2D. Basically after learning the mechanical prerequisites a willing 2D artist can create virtually anything without further effort. Perspective, shading, adherence to a reference style, all those things apply equally to two teenagers holding hands or an insectoid alien getting skullfucked by a futa catgirl. 3D has the intermediate layer of needing to both find/create the models and then working with them within the confines of the software leading to a lot of very "mundane" artwork. Even if you aren't literally using the same models anyone who can't create their own from scratch within a reasonable time frame will never be able to match the variation a reasonably skilled 2D artist is capable of.
Where 3D wins out is quantity. Animations in particular take way less (human) effort relative to still images and even simple posing has more freedom than 2D "image variation" CGs. Only for some reason most projects here are pre-rendered still 3DCGs instead of live-render sandboxes where the end user would actually have access to this amazing power of 3D such as using Illusion character creators yourself.
Where 3D wins out is quantity. Animations in particular take way less (human) effort relative to still images and even simple posing has more freedom than 2D "image variation" CGs. Only for some reason most projects here are pre-rendered still 3DCGs instead of live-render sandboxes where the end user would actually have access to this amazing power of 3D such as using Illusion character creators yourself.