I guess once you have more then two or three of something you can call it a "collection", right?
I started with one design uploaded to Spoonflower and now I find I can't stop. It's so fun to design fabrics and coordinate them all with each other. Get a theme going. Mine is a cross between old Laura Ashley, Shabby Chic and faded 1930's florals used on dresses, feed sacks and later, in quilts.http://www.spoonflower.com/welcome