that's a good one, yeah. blowtorch approvesI have an MXR Super Badass Variac fuzz. My taste is for the more light and controlled fuzz so I have the variac up at 15v and pretty low gain. Turing the variac down does get that spitting, tearing sound that many like. I set it to be an almost always on boost that goes from clear to all the fuzz I want using the guitar volume. It is very touch sensitive and can be controlled with pick/finger attack. I don't know if it is compressing the signal or boosting certain frequencies but even at low guitar volume with no fuzz it fattens the signal and makes any guitar sound like more of itself. It really pushes the amp so there is a mix of fuzz and amp crunch. Humbuckers push so much more signal than single coils that they require different pedal and amp settings to have the same range of clean tone to fuzz.
I did find it doesn't like to have any buffer in front of it, or else it will generate a constant droning fuzz at one specific frequency that stands out as the guitar is played. I now have it first in line and it is perfect.
My main fuzz these days is a Blackout Effectors Musket. It can cover everything I want a fuzz to do, and always sounds powerful and awesome