Like I said I would, I spent a lot of time thinking about my joining the JET program. Let's look at both sides.
I would get to spend a year or more in Japan.
I would get to explore more of the world.
I would get to experience a new language and culture.
I would get paid more than I am now. Seriously.
It would push back getting a house by a year or more.
The higher cost of living would probably eat up the extra pay.
I would be away from my family for a year. Um, is that really a con?
I wouldn't be able to focus nearly as much on my other interests.
In the end, it was the first and last con that helped me determine that joining the JET program isn't the best path for me. Yes, it would be a great adventure. Yes, I would learn a lot. Yes, it would change me in ways I can't even imagine. But I can get much of that another way: one year after I get a house of my own, I'm going to spend four weeks in Japan. This gives me time to save up, learn more Japanese (which I will continue to work on), and still move forward with my life.