Without a doubt, my '82 Schwinn Superior. It is the only build I've done where each and every component was chosen to suit my taste in style and function. Granted, nothing strayed from C&V (though strictly speaking, the V/O fenders and generic stainless bottle are K.O.F.), but that's because I had no particular component preferences outside of C&V to begin with:
It's not the best hard-riding bike I have, but it certainly is the most effortless of the fleet to shift and brake with.
-kurt