I don't find either of them to be interesting. I'm interested in fucking human females, not 2d animated characters. The irony is that those 2d characters are more human than most human females.
If it's drawn, I'd rather read hentai manga than watch hentai anime. Bad voice acting and poorly-done animation REALLY annoys me, so watching anime is just giving myself 2 more ways to get distracted and irritated.
Yes animation is key. I went back to a few of faves from back in the day and just didn't hit the same. Manga/doujin was just something to look at on occasion. Outside maybe one series mostly just skimmed through before looking at something else.
.either porn or hentai.
Since we're talking about mangas here, I'd say it's marvelous.
You can get a good romance one during a fap cooldown, and probably destroy your chicken when you're reading the more vile ones.