I have Too Much Stuff. But I keep going through it looking for Stuff I Don't Want To Keep and finding very little of it (always some, there's always the postal spam pile for a start). I'm not sure if this is good (I only buy things I later still like having) or bad (I like having too much stuff) but either way, it's not going in the bin just yet (or the recycling, or the charity shop).

I think the only thing I've ever wanted to de-clutter that was clearly usable-by-someone-just-not-me (as opposed to "totally broken") but couldn't be charity shopped was a fur coat I had as a child (still got it somewhere, should make use of it really). Perhaps I just never try to give strange things to charity shops.