Let's see, my divisions:
solids by color
large flowers
stripes
flannel
checks, gingham-like
bugs
Christmas
Easter
Halloween - every holiday really
white
ecru
patriotic
obvious children's theme
plaid, homespun
small prints, by color
animal print
border print
golf theme
black prints
30's prints
dog theme
theme fabric, bought together, which basically means anything that doesn't fit any of the above categories
That's a lot of categories! Somebody better get busy, as some of these categories have quite a bit of fabric in them
Thanks for the brain work though, it was fun going through my stash mentally