Man, this topic made me realize I'm way pickier about comics than I thought. For a really different art style, there's 'No Longer Human' adaptations—some of the erotic manga versions have this scratchy, almost grotesque ink style that fits the dark themes perfectly. It's not pretty, but it's gripping. Plot-wise, 'Ooku: The Inner Chambers' is fantastic; the historical setting and political maneuvering around the shogunate provide a dense backdrop that the intimate moments are woven into. The art is detailed and period-accurate, which makes everything feel more substantial. I tend to lose interest if the story feels like a mere vehicle for the spicy scenes, so these two stand out because the art and narrative are inseparable from the adult content.
A friend recommended 'Heart no Kuni no Alice', and while it's not strictly 18+, some versions get pretty intense. The gothic, doll-like art creates a surreal tension that enhances the psychological and romantic elements. It's a good example of how a unique aesthetic can make familiar tropes feel fresh and more engaging. I guess my takeaway is that the most memorable ones treat the art as part of the storytelling language, not just decoration.