Contemporary, batiks = these are the fabric i routinely buy for my stash whenever i see them for a good price. i have plenty in stash so i can wait for the sales.
Retro, traditionals, historicals, novelties = only purchase for specific projects, i never keep a stash of this fabric
Holiday = i only buy holiday fabric after the holidays when it goes on sale
Blenders = i never buy blenders - i dye all my own to match specific projects.