Do you have any restrictions (physically) that restrict what you can do? Also, what do you like to do and what type of environment to you like to be in?
I'm a software engineer and love it, so I would recommend that. Pay is good allowing me to afford things like a 2013 JKUR. But work can be stressful and hours long. (thus my jeep is an escape)
My father is a retired forester (Washington state DNR), loves to spend his time outside as much as possible, now in his retirement he does ranger work for the NPS. So I'm sure he would recommend Ranger or Forester, or anything that is outside most of the time, pay not as good, but that doesn't matter when you are truly in your element. every day is a paid vacation day.
If I could do it again, I don't know, but it would involve more freedom to use more of my time as I see fit, and go the places I want to go, when I want to go there. (much like my father?)