There are certainly fabrics I would buy again if I had the opportunity!
I've been quilting about 40+ years now and I used to have a terrible time using up the last little bits of fabric. I still knew their stories, remembered when I bought them, what projects I used them for, etc. Was obsessed with waiting for the right project at the right time.
Then I had some changes in my life, mostly due to my progressive vision loss. I changed a lot of attitudes and one of them is my current mantra: The best use is whatever use I have for it now! And sometimes that includes sending it off to someone else.
I just had a battle over myself last week with sending someone a variety of themed fabrics, I had two pieces of something I loved which would be the perfect amount for the other person. Could have kept one piece which wouldn't be quite enough for the other person. Went back and forth and finally sent both pieces in the box because it was the right time, and the right project, and the right person even -- even if it wasn't me!
I hold a little ceremony now when I cut/use that last little bit. I spend a few moments going over the memories, and then I stitch it down and move on. Did the same thing when I sent that piece out, funny thing was it didn't really have memories or anything, it was just a cool piece of fabric. There will be other cool pieces of fabric for me in the future!