I have a hard time throwing stuff away, but it's not really joy, it's that 'but what if I need...' which on a logical level I won't (really, a Palm Pilot, ian?). It applies to clothes, but I fear I'm a functional dresser. My wife throws my holey socks away, I'd keep them, it's only a little hole after all and I don't live in Japan so no one is going to see them. She buys lots of clothes and more shoes. I'm not sure why. We always do the 'is that new?" and 'oh no, I've just not worn it for ages' which is always a big lie. (I don't actually care, beyond the fact she's filled every wardrobe to neutronium density and if I make the mistake of opening one, it all falls on me and makes me squeak.)
I don't think I'm a possessions person really. I did hang onto physical music for a while but a while back, gradually making the transition from CDs (now piled up in the garage) to digital music and, finally, to streaming. I found that a bit hard, but I had to admit in the end that I was buying several albums a month and some were getting listened to once or twice only, and for a third of the price, I could listen to everything.