My son-in-law is employed as a commercial web designer and adobe flash programmer.
He's worked on Bacardi, Dewar's and other major advertisers.
He's received awards for his professional work.
Website design, layout and context is a professional job, done by professionals, and amateur ones are very obvious.
Things most important when developing a commercial site are:
A clear, concise front page. Express your purpose or mission with as few words as possible. Get to the point!
Grammar and spelling are very, very important if you wish to portray a professional image.
Keep it clean, uncluttered and fast loading.
Give the viewer a reason to call you or want your product or services.
A few examples of his amazing work.
White Rock Media Mid-Ohio Foodbank DEWAR'S proshop: Enter to Win a Dream Golf Experience
Enjoy the viewing.