Gonna sound weird, but the ability to change a person’s age at will, with the ability to make the progression/regression either physical, mental, or both at once.

Imagine you have a co-worker who acting like a little kid. You could turn them into what they’re acting like physically so they can suffer the indignity of knowing they’re not supposed to be so young and helpless. Or follow an age regression storyline where your cheating partner gets turned into a helpless baby that you now get to take care of and embarrass as they still retain their mental state.

Also, imagine you and a friend are going to some event like a movie or a fair or something else where kids get cheaper tickets. You or your friend could be shrunk down to kid size and then all you would need to do is find a place to change back once inside. Saving money!

The possibilities are endless. Also, blame the fact that a lot of cartoons from the 90s onwards that I watch/watched in reruns have some form of age regression stock episode where one or more of the characters goes through age changing shenanigans for implanting this idea in my head.

Getting laid.

Becoming an agent of an ancient entity who gives me power and prestige in exchange for aiding with their possibly-evil goals.

Like my Fursona!

furries rn: become my fursona

Secret group of super powered freedom fighters recruits me to their cause on the basis that I’ve got some kind of special sauce inherent to my being. Hot chicks who’ve admired me from the shadows hand me weapons that I somehow already know how to use, and only their utter devotion to our world-saving cause keeps them from ripping my clothes off and covering me in kisses. All the horror and suffering of my life finds meaning in a mission the fulfills my need for purpose.

I’d love to retire to a cozy inn with an endless pot of stew

Be able to shapeshift so my body can finally match my identity

I’d like minimum wage to be able to support my family, so that a job flipping burgers could actually feed us

Failing that, to live as a bunny in a cottagecore tree stump, spending my days slicing up strawberries like they’re roasts, and baking pies with my neighbours

One where there were multiple sentient species in addition to humans.

The fantasy: i gain time stopping powers with little to no side effects on using it

The result: “Billionaire suicides skyrocket across the globe”

I would like to choose how I live in the world outside of the control of capitalism, the nation state, and boarders.

Wish granted ! Stand right there I’ll be back in a sec !

Star Trek’s 24th century Earth sounds like a reasonably nice place. I doubt I’d qualify for Starfleet, and wouldn’t try.

I just want to see what life is like for the average broken neurodivergent in that reality. Also, what’s at the location of my current house in that reality? Same construction? Did a version of me live there? Was it there but replaced in the intervening 350 years? etc.

In case you’re not aware, there’s a whole genre of media like that called isekai.

Being able to actually do anything you understand well enough, the way that magic works in many settings. A brilliant engineer can design an airplane, but he still needs lots of workers and machines and materials to actually build one. A wizard who knows how to cast “fly” can just go ahead and cast it and fly around. If he has the right books, he doesn’t need other people for anything at all.

The sort of mystery only possible in a story where the author himself doesn’t have to know what the secret is. I love science but I was very disappointed when I was a kid and I realized that science meant that everything ultimately had a mundane explanation. A mysterious structure? Built by some Bronze Age dudes. Dinosaurs? Unusually large animals. Legendary heroes? Made-up stories. Even if elves or unicorns turned out to be real, they would have a mundane explanation too because the whole universe follows rules.