Material?
2-3-4 parts?
Shape of the teeth?
Kief catchers?
Brand?
Price-performance?
...or do you shred by hand or have a cutting board? Why?
I'll start with my shiny new thing..
Anodized aluminium - because interwebs tells me it is the thing now..
2 parts - cannot see why I would want to catch kief outside my bowl?
Santa Cruz's shaped teeth, "it shreds" - again interwebs told me so..
Brand played a big part here, it was either this or Space Case since I wanted a "top brand" grinder.
Price-performance... well, it does make really fluffy grind or should I say shred of the materials, but I cannot help thinking that 3eur/freebie acrylic grinder really grinds the 'erbs in to smokable consistency.
No peer pressures, if people have own and/or better choices and devices - let them be seen and heard!
I went and got this (Gun metal, medium 2-part - 7cm, Santa Cruz Shredder):

