You know, enter number, get a face. Create face, get an unique number. Really liked this feature in ME2. And also i cant seem to be able to create non-ugly non-human faces...
It would've been nice, but I think it is too late.
Good-looking faces are all about regular ratios. Nothing is extreme. I think from front on, the important things are the eye position and mouth position. You look at the distance from the edge of the face to the outer edge of the eyes, and the inner edge of the eyes to the nose; and then also at the bottom of the chin to the bottom of the lips, and the top of the lips to the bottom of the nose. The inner distances are slightly smaller than the outer distances, like http://photos.last-video.com/wp-content/uploads/2009/11/photo-sublime-angelina-jolie.jpg, but the ratio is similar. For the profile, everything goes in a vertical line, except for the nose of course, which shouldn't be too big, like http://www.macwallpapers.eu/bulkupload/sixy%20Girls/Angelina/Angelina%20Jolie/Angelina%20Jolie%20Profile.jpg. Eyes should be set quite far back. The same basic rules apply for non-humans too.
However good-looking can = boring.