Sounds like you're ready to get rid of things that just don't care for any longer. Good for you. Why waste time trying to talk yourself into using something that's old, thin, doesn't feel good, doesn't do anything for your spirit to work with?
I've learned a couple tricks that help me purge and I'm satisfied.
1. Rate your fabric 8,9, or 10. If it's less than an 8 on a scale of 1-10, why keep it? Only exception might be neutrals, which can be hard to get excited about.
2. Don't overthink. Work fast. Do I like it or not? How much? 8,9, or 10? Then keep it. If not, donate it. Someone might be looking for what you're giving away.
I have found that I do not start liking fabrics more with time. Just the opposite. And what do I like better than keeping what I love? Nothing!