Unless you have a site that is so general and appeals to everyone you should have some idea of your audience. Target your messages and layout to them. It shows respect for your visitor. If you don't constantly solicit feedback about what works at your site, you're preaching to a choir that isn't even in the room. With a few million web site options out there, you'd better have some clearly defined difference that makes people want to return again and again.
Feedback is therapeutic for everyone.
If you can post criticism and suggestions, then implement the changes that make sense, you'll gain immeasurable credibility with your audience. It also adds to the feeling that there may actually be a human being behind the web site. If you're trying to add to your shelf of awards. If you're trying to make money and create a valuable web site, design a site that doesn't put the premium of beauty, but of functionality. Look, nobody values creativity more than I, but if you're more interested in showing off what you can do with Flash, do it on your own time.