I'm about 10 years away and haven't 100% decided what I'm going to do, but that should be around the time my oldest leaves the house. Here are some things I've thought about, in rough order of my passion for each:

• join/start a charity to help people get out of debt, perhaps with low-interest loans based on behavior instead of credit
• make video games, and perhaps start an indie studio
• run for local office - I don't want to be a politician, but my state legislators have run unopposed ever since I've lived here
• really get into carpentry - I may do this before hitting FI, I've been wanting to build a treehouse for my kids for a couple years now

I'll probably do one of the first two, we'll see about the rest.

I'm living FIRE, but the "next endeavor" is, and always has been (in my opinion), to create generational wealth

I think about my next endeavors a lot. I make it a point to invest some time in them now while I still have the energy. I know some people who retired and felt a little lost because work was their raison d'etre or they were waiting for retirement to pick up a hobby.

If I hit FI, I plan on immersing myself in my hobbies (playing guitar, photography, gardening), building furniture for family and friends, and exercising more. And spending time in nature.

Also, since my dog is a recue, my altruistic pipe dream is to make enough money so I can buy some land and adopt a bunch of shelter dogs. Maybe even start a non-profit so I could pay the people who work at rescues a decent wage bc some of them are saints.