Work at your own pace, make as much or as little as you want.
I enjoy Uber because it is one of the few well-paying jobs that allows me to log off whenever I want and do the things I like to do. If you want to travel for a month or go on a camping trip, you don't need to book time off or deal with management in order to enjoy the things you love. The huge downside is that for a living wage, you need to work at least 10 hours a day, and some days can be VERY slow. You never deal with management other than e-mail memos reminding you of the rules and laws that Uber and drivers must follow. The hardest part of the job is sitting waiting for rides, so if you are the type that can't sit still, I would not recommend it. Overall, Uber has been a good experience, and has allowed me to do the things my former job prevented me from doing.
Free time is whenever you want it
Long hours of no physical activity.