To make yourself familiar with the kind of domain names that your users might prefer, it is expected that you take into consideration the opinion of others about your domain name choices.I would like share certain things that you need to fight shy of while registering a domain name to be used for your main company web site:

*Avoid the use of hyphen because it enhances the possibility of forgetting your domain name while typing your name into the browser or even at the time of sending e-mail to you. This is problematic.
*Strive not to use digits in your domain name. For instance, if it is 3.com, you have to make everybody aware that it is not "three" but "3".