I didnt have any cravings at all for most of my pregnancy, but towards the last couple of months I chewed ice all day, I just could not get enough of it (lucky our fridge made it)
I drove my husband mad crunching away on it while watching tv, I would even go into maccas and just ask for a cup of ice, they looked at me weird. I had to have it all the time, so much so that when we went to a car show I hunted down the snow cone stand and just asked for plain snow cones, they thought I was weird too but I kept them in business all day, my tongue was so numb.