I use white 90% of the time (mostly product photography) but also have black, light/dark blue, red, tan and yellow for certain circumstances.
The problem I discovered with buying bulk fabric from a retail store is no edge hems/crimps and even more important no rod pocket for a backdrop stand. Unless you have seamstress services available I recommend buying any backdrop from a supplier who has them ready to go on your backdrop stand, ~$20/ea on eBay.
To avoid developing intense hatred of steam irons, get innovative about where to store your backdrop(s) when not in use. I use cheap garment racks and then cover them with old sheets to avoid dust, etc.
Don't forget clamps. They are handy.
Great tips thanks. While I can see where a space to slip the support rod through the fabric would be nice, is there an issue using only clamps to hold the backdrop to the support rod?