I've been building and flying for a very long time now, and I can't say enough good things about the FT Flyer/Blue Dart design. In my opinion, it offers the best first build/fly experience possible. Add ailerons, and you have the best 4 channel trainer I have ever flown. Other planes have advantages in one aspect or another, but none offer the total package that the Flyer does.
Beginners: Go build/fly one this weekend!
Experienced Pilots: Add ailerons and I guarantee it will put a smile on your face!
No matter how long you have been flying, the FT Flyer has enough options to keep you interested. As your skills increase you can: add ailerons, add steerable nose gear, add retracts, increase the throws and learn 3D, add bamboo skewers to the leading edge and fly combat, teach someone else to fly....
The possibilities are endless from $2 worth of foam board. Check it out soon!