Yes, many people here love DHI, but there are many here who don't care for it at all. One of the main reasons people don't care for DHI (aside from how strong it is) is because of its very strong iris note.....which many here describe as a "lipstick" smell or a woman's purse. I'm sure you know the smell. If you don't, you'll know it as soon as you smell it. It can be overpowering and usually one or two sprays is enough.
The cocoa smell, to me, doesn't come around fully until late in the fragrance, or until the iris starts to die away. A lot of people mistakenly buy DHI for the cocoa smell and are disappointed when they are overwhelmed by the iris.
If you're wanting a wonderful cocoa fragrance that has a decreased chance of being offensive, is enjoyed by most, and is very high quality, I would recommend Guerlain's L'Instant de Guerlain Extreme, commonly called "LIDGE" here on BN. Or, another alternative, is to buy the less potent Dior Homme for the same overall smell as DHI, but less of the oft offending lipstick note. Still a beautiful scent.