SteveWh - 9:29 am on Jan 21, 2012 (gmt 0)
When I added a contact form to the page where my email address is, the number of inquiries increased. People seem to prefer the contact form. And as don1ddg said, the form is very useful if you want the user to provide certain information in a particular way.
When I'm on the other side of it, I somewhat prefer to be able to use an email address because I can format the email the way I want and don't have to work in a little textbox. But if they want specific information, I appreciate the usefulness of a form that shows exactly what they want.