For starters I guess it would be the go-to obvious things. I would get a place to stay. House or apartment, I don't think I would necessarily be happy in one of those giant mansions that rich people live in, but just like a decent place to live that's not entirely out of the way geographically. I would also get a car. Again, not talking a Lamborghini or anything but maybe something on the higher end of your 'average' cars. Not sure about what brand of car but nothing that sticks out like a sore thumb.
If it's life changing money to the point where working just becomes obsolete then I would most definitely quit work as well. Would definitely have more time to sink into hobbies that make me happy like creating music, but part of me still thinks it could be nice to work in some capacity, just scaled back a lot. The worst thing about work is the hamster-wheel you end up in where you work 45-50 hours a week to make it through the month and then it just repeats again. But there's other nice things about working such as the social aspect and having a place to go to. I don't necessarily think that getting rich and sitting back and living a more isolated life just doing hobbies will make you happy.
I don't necessarily think my spending on a day to day basis would increase that much. Sure, I'd be able to pick a fancier option if I want to go to a restaurant but generally speaking I'm not much for some of those options anyways. I would also share some with the people close to me but I would have to think about in what capacity I would help.