Many years ago I just saved most of it, helped my family out with most of what I didn't save, and anything extra after that I spent on fun things. I did a lot of target shooting which isnt exactly the cheapest hobby so most of my self-given allowance went there.
Then starting a few years ago lots of severe medical issues happened, and I had to devote most of my money to that. I had health insurance but they deemed most everything as "not medically necessary". I mean, I guess technically speaking me being alive is in fact not necessary, but I am also pretty sure the whole point of healthcare is to avoid that... Either way, I ended up going near broke because they wouldnt pay for the procedures and treatments I need. In the end I got on a state funded healthcare program that covers almost all the expenses because I could not possibly keep up with the medical bills.
Now I spend most my money helping my family I live with. I am sort of self conscious about spending any on myself now that I'm in that healthcare program and try to avoid doing so.