Usually when you say “put a nice face on it” you’re talking about making the best of a not-so-hot situation but in this case I’m being literal: put a nice face (cane) on it (the bead).
The addition of a fancy or more complicated cane to a focal bead adds elements of interest you may not have space for on smaller, more tightly designed beads. Personally, I like to make little scenes or stories on the focal beads, setting up simple floral canes and more complex insect, face and animal canes as a part of a whole. These are the fronts of 4 recent ones:
The reverse of these beads have butterflies and other little details – you can see them in this flickr page.