If a field is optional, give strong consideration to omitting it from the form entirely. I totally agree. In that case less is more. You want users to go thr

If a field is optional, give strong consideration to omitting it from the form entirely. I totally agree. In that case less is more. You want users to go through a sign up form quickly and be able to get started. You can always provide a settings panel on the other side for adding extra, optional information. By keeping those fields off the signup form you make things easy and fast for new users.