It's a personal thing... I stock up on fabrics I love during sales especially and sometimes I'll splurge at full price. Some I have a plan for, others I don't. I live in a rural area so my stash contains a lot of basics like backgrounds and blender fabrics. Is it more than than I need... yes. But I consider it an investment. If my tastes change I'll cut it up and make scrappy quilts or use it for backings. There are worse vices than fabric!