Sig Citabria
Tried this kit a few years ago as my first build and had just enough skill to build a pile of firewood out of it. Swore I'd always go back and finish one when I learned to measure then cut.
Here it is:
Covered in 21st Century fabric
Goldberg tailwheel
Dual aileron servos
Sullivan flying wires
OS 46AX with modified Pitts muffler
Dave Brown Ultimate spinner
This was a challanging kit and a bit frustrating at times, but worth everything new that I learned. It will be the first one in the air this spring.