Isn't it great?!?!
For me, there really isn't a favorite, per se...but I like everything it does. I run mine dual output style, with the piezo running to a small acoustic-centric board, that then runs to an acoustic amp. Like you, I really like blending the sounds and depending on the song or overall feel, I generally like one side more present than the other.
Some songs might want the magnetic side at the forefront....a chunky, gain-y riff with the piezo side slightly below it in volume.
Sometimes a primarily-acoustic song with big open chords sound great with the magnetic side running through a tad bit of gain and just a smidge of volume.
Songs that have lots of individual note picking sound great with robust piezo, and position four on the 5-way blade (single-coil neck and bridge) on the magnetic side at a slightly lower volume than the piezo. I'll usually add a decent reverb or modulation to that magnetic side to really dress it up nicely.
To me, it's the most fun guitar to play because of how many different tones and sounds you can get out of it.