Designing for users obliges you to make certain choices. Any barrier to entry defeats the purpose of foolproof usability. Sites designed for users must be clear in their navigation as well as their text. Users must be able to intuitively find what they seek. Where help is needed, it must be plainly marked and easily understood.
Ambiguity is a wonderful thing in fine art, but it has no place in a user-oriented web space.
Similarly, the merely decorative has little place in a site designed for users. Nor do users have patience for digressions, or for multi-tiered layers that get between them and the information they seek. Those elements are fine, however, if your site is designed for viewers. They want to be surprised, seduced, led along a path. Their goal is the journey, not the end result.