When creating a website it can be easy to get carried away with advances in design and build in lots of moving elements and changing banners etc, but you do need to keep in mind who your audience are and what it is you are trying to achieve with the site. If you make your website too futuristic and have lots of different call to action banners or moving elements you may find that some viewers find it too confusing and do not know where to go once they have landed on your site. When this happens you will often find a larger percentage of your viewers leave without having found what they were looking for.
One way to tell if this is happening is to check your bounce rate. If your home page has a high bounce rate then it may be that it is putting people off. You should also check what description of your site is showing in the Google, Bing or Yahoo listings and ensure that it is relevant and correct. You can often influence what is shown here by updating your meta