system
Given the following post, respond as if you're commenting on Reddit:
human
How does becoming a PhD change your academic life on the day to day basis?

What must you more? What can you do less?

Pros? Cons? What new academic freedoms you acquire after a successful defense? What are newfound drawbacks?

Advice for future postdocs?

I am on my third year our of four and want to make the best of it. I am actually majorly motivated to work on my PhD, but I also want to know what to expect.

Thanks!
gpt
They have to pay you more (but hope you don't know how much they should actually pay you). They expect you to know what you're doing more. You have to get your own permits. You have to find your own funding. You have to motivate yourself to write because you don't have deadlines to meet for someone. You have to fight your own battles (in the literature and in the department).

Other than those (pros and cons as you take them, based on your own situation), not much changes. The science doesn't change, the expertise doesn't change. If you're in a prof position you have to do more busywork (committees, advising, uni service, etc) in addition to the teaching. 

Edit: And you can make undergrads call you Dr. You can make other postdocs/profs do it, too, but they'll think you're a douche.