Besides fabric..my sewing collections would be patterns..books...sewing tables and desks..or cabinets ( I seem to think I need these all over the house) and I love storage bins for my fabric whether they be antique bins...decorative in some way..just to display the stuff I love to buy..( not plastic rubbermaid ones...although those might be nice in some cases)...Other than that I think I collect quilt tops...I haev so many sewn together just need to be quilted??
Other stuff is scrapbooking supplies...and make-up, lotion and shoes!