Personally, I'm looking to pay off my house, pay off the car, and then save up ~$2M in cash (Could happen quickly if the options in the startup I work at pay off, which based on current growth is very likely), then throw that $2M into an index fund and retire.
Maybe in retirement, I'll actually feel like I have the time to get some work done on personal projects. I have ideas for things I want to make that could make a couple dollars, but I'm tired all day and don't want to spend my limited free time working.