Maybe you're just conditioned to not want things from your childhood. I remember wanting to have nice sneakers in school because all the other kids had nice sneakers and they'd make fun of you if you don't. I'd spend time in footlocker just looking at the stuff they had or sift through my eastbay catalogs but never buy anything. I wasn't happy that we couldn't afford them but after seeing that we had to take out loans and borrow money just to make ends meet, my desire for sneakers quickly dissipated. Even to this day when I can afford nicer sneakers I don't really want them anymore...or anything else for that matter. I feel like I've completely inhibited desires for most things, except whenever I experience quality that matters, I see the point of spending money, but it's hard to know what they are until you experience them. For example, a nice mattress is a hugely valuable investment and quality actually matters, but I never felt the difference until I crashed at my friend's house and slept in his bed. I'm curious what are some things where a more expensive version of the same thing is actually 10x better than the cheap version?
This is what happened to me. At some point, I realised that asking for something puts more pressure on my already stressed parents. I actually regretted having demanded few things. At first I forcibly stopped myself from wanting to have things, and eventually the desire simply vanished.
If you walk a lot, good sneakers make a huge difference. My knees are... well, but ideal, but much better, since I got better sneakers that cost more money.