Profile planes are fun to build due to the simplicity of construction, however they lack a certain aesthetic appeal. Quite a while ago, I started experimenting with several different construction techniques to make foam scratch-builds more appealing to the eye.
I created foam wings with true airfoils by using ribs on top of the bottom sheet of foam, and then folded the wing back over itself onto the airfoils. For fuselages I created box air frames much like you'd do when creating a larger balsa wood model. However, much of what I was experimenting with was fairly labor intensive, and while it looked better it was still blue foam.
I've been following Flite Test ever since they started up, and while I have not yet tried any of the plans from their swappable series, I have to say I have been impressed with the aesthetics of these airplanes. The best part is, people smarter than myself have come up with some incredible construction techniques for foam air frames.
If you haven't checked them out, take a look.
As always the flitetest website is a huge wealth of knowledge, and it's more than worth the time for a look around. Hopefully, during 2013 I'll get time to build one or two of these planes.