My usual description of it is: it can touch you as deep as a very good book can. That's basically because, as you said and like DE, it's basically a great interactive book.

I regularly post this here but if you're looking for other games where writing, worldbuilding and dialog are - by far - the main focus of the game and quality of the same is excellent: Sunless Skies, Sunless Sea, Pentiment, A House of Many Doors.