Well, I just replaced the head gasket on my super efficient car. From 15mpg to 50mpg, I rule the fuel pumps...
(Note: Replacing head gaskets sucks. But spending good $$$ on a top notch torque wrench is nice)
Hopefully you remembered to use an air compressor to blow out all the moisture/debris in those head-bolt holes. (This is the number one reason for premature headmaster failure.)
Yes the job SUCKS! but beats the hell out of a complete engine swap. (Mainly due to money saved and uncertainty about longevity of a replacement engine)