Remember that thread is aimed at people with significant storage - those of us with a single box of fabric have no motivation to respond in that thread.
I only buy for projects. Now since I like the scrappy look I tend to get lots of 1/2 yd cuts and have some left over, but I try to use the same fabric in a few projects. I only let myself buy 2 projects ahead - that gives me a reasonable time to collect the fabrics but not overbuy. I live in a small condo and do all my sewing in the dining room so I have to have tight constraints on fabric I bring home.