Ice - I don't munch it but I suck it then munch it when it's softer.
Be prepared to be grossed out (I find myself saying that alot on here nowadays):
Skin picked off the bottom of my foot
Scabs
Thick finger nails or large pieces of trimming intact
Spoons/forks
Ends of pens
Plastic bits
Ear rests of reading glasses
I don't eat any of it - I just chew/gnaw at it then spit it out when done.
I've heard of overwhelming urges to consume dirt, glass, metal, sofa cushion, vaseline, condoms, wood chips, sawdust, fecal matter (both animal and human), urine, switchblade parts, nails, bolts, and paper. I just count my blessings that I crave none of the above mentioned...for now.