this is actually such an interesting question..
IMO i say 2D, since for me, thats how i best draw the line at fiction/real guys.
I remember when i first saw LADS, i thought it was really weird

i ended up playing it and liking it somewhat, but i think it being 3D coupled with the intensity of the story and relationships (to the point thats not usually seen in otome), I was reluctant to keep playing and ended up dropping it after i got through all the chapters at the time.
That being said, i do like the modern-ness its brought to casual otome, like the period tracker. I think it makes for a nice woman-centered way of playing that you dont see anywhere else. i personally just get a bit uncomfortable with my men being so HD, since seeing their pores makes me realize just how 'perfect' theyre supposed to be (at least visually. ly caleb ). i do think they have a higher chance of attracting a more widespread crowd, too, as weve seen with LADS! ofc that can also bring ppl who are less familiar with otome to view these characters with less of a 'fictional' lens, but over all i dont think that attention is too detrimental?
and if im being honest, i dont hate 3D at all. Id even say i wish 3D otome were MORE risqué lol, i think a hentai 3D otome could be a fun experiment. or even a non-mobile 3D otome!
i just find 3D a little too jarring at times when it does get intense, so i stick to my pore-less anime men
im curious if u guys think the same tho