Oh I love my stash. I actually had to make a stash to create my first quilt (I had only sewn clothing before and honestly had nothing suitable for quilting) and that stash contributed to my second quilt and by then I was surely bitten and in the throes of neeeeeeeeeddddddiiiiinnnnnggggg more fabric!!!!!
Now, I go with the flow. If the fabric speaks to me, I buy a little. If it yells at me, I buy a little more. Sometimes I look at my stash and scratch my head, but a week ago, I pulled out a bunch of red white and black blocks that I had (mostly) completed about 5 years ago. I finished off enough for a twin sized quilt. Then I went back into my stash and pulled out a bunch of Japanese blocks that had been gifted to me. I ended up opening the blocks and, using black sashing, recreated identical sized blocks. So, my aim is to make a reversible quilt--red white and black on one side and Japanese panels on the other. This will be my winter project.
So to stash or not to stash, ahhhhh that really is the question.