A Siamese cat. Every one I have ever met has had this wonderful personality, and I used to read this series of books by this English author about life with her Siamese cats. Sadly I'm allergic to cats.
A friend had a marble clock that I thought was the coolest thing. I've seen them around lately and still think they're cool, but it's impractical, noisy and takes up a lot of space.
I did end up buying a Turing Tumble which did scratch that itch.
Travel. I grew up in a working class family in a rich area and I was always jealous of the other kids spending time over the holidays skiing, going to Egypt, Italy, all sorts.
I've ticked off a few countries now but almost all around Europe. I want to see more of the world, just not affordable at this stage in my life.
More from my college years, but an ex made off with more than half of my video game collection right before scalpers/speculators started driving prices through the roof. Most of my GameBoy games. My favorite GameCube games. All of my Genesis, GameGear, Xbox360, and N64 games plus each of those consoles. Including multiple complete in box games. The argument was that she found and bought some of what she kept, but it was always bought using my fucking money. She didn't have a job past our first year together. Really had me swindled. Don't mingle finances until you're married folks.
From childhood? A whole bunch of LEGO sets that are either out of print now or are still stupid expensive. Hard to justify $50+ on LEGO.
You can get a good quality repro cart, repro box, and repro players guide all together on AliExpress for ~$80 if you shop around. Or at least you could a year ago.
Still super overpriced, but cheaper than dealing with a scalper.
I had a couple of idols in my childhood I wanted to meet (technically three, but I kind of accepted the third would be out of the question). I met one, and am proud to say we're great friends who regularly communicate, but the other one remained unmet, and a few years ago, he sadly committed suicide. RIP Jason David Frank.
Not sure if you were going for answers more like "ice cream for dinner every night" or "not having glass bones and paper skin, not breaking my legs every morning and not breaking my arms every afternoon".
My frivolous answer is a balcony. My depressing answer is a best friend and/or a sister close to my age who is nice to me. OR for my dad to die. OR to wake up and learn that my life was a dream and I'm someone else.
I wished I was more creatively inclined. Building stuff, playing music, drawing, the works. I've bounced off it a couple times since then but I'm at a job where I work with my hands now so I'm getting money and practice 😗
I also wished I was a girl but that turned out to be more possible then I knew at the time
I've always wanted to visit a factory. I've been in an airbus factory and that was nice, there were Tibetan monks there too. But it wasn't like a factory factory.