Is Joining The Military A Good Idea?

I am not sure what I want to do with my life, so I am thinking about joining the military. Do you think that's a good idea?

This is a very broad question OP.
First, what country do you live in?
Do you have any preference on branch and job?
Your experience can vary wildly depending on the answers to those two questions.

Don't join for money or tuition payments.