The whole reason I wanted to retire early (since my 20s) is that my hobbies and passions are not the sort of thing you can do on nights and weekends. I needed more continuity to fully pursue the things I love doing.
I have a fully equipped woodworking shop. When I'm doing a big project, I can be in there 16 hours per day for 1 to 2 weeks. I also have a modest recording studio that I'm constantly updating. I'm also regaining my guitar and keyboard chops from my college days. Writing music and really getting into a music project takes many hours per day over many days.
I also enjoy home improvement projects. We've got a very large, very old house. DW and I are "re-inventing" it, one space at a time, inside and out. In 5 years of ER, we've remodeled 3 full bathrooms, one half bath, two bedrooms, and the office. Plus numerous areas outside including several retaining walls, gardening areas, rebuilding a deck and a fence. Kitchen is queued up for 2019, with me doing new cabinet and drawer fronts in the woodworking shop. Still a long way to go on the house.
We also travel quite a bit every year, usually one 3-week international trip and two 1-week domestic trips, including some tent camping and hiking. Recently, we've started traveling less due to the in-law's health and other issues. Not sure when or if that pace will return.
I had plans to start a small real estate business with around 5-7 single-family rental homes. We bought two and then sold one after 3 years. The one we sold was too far away and had too many issues. So we've dropped those plans. The one we still have is on auto-pilot so we'll keep it until that changes.
I also had plans to teach at the local community college. I have a friend there who continually asks me to try it. It pays, but not very much. So basically volunteer work. Right after I retired, I gathered all my documents, including college transcripts, and filled everything out, put it in an envelope... and then never sent it in. It's still sitting in my desk drawer. After 5 years, I still have no desire for the structure or time commitments that even one or two classes would require.
I won't elaborate on cooking, biking, video editing, collecting vintage audio gear, babysitting granddaughters, messing around with home automation, and several other things that provide near endless choices on how to fill the day with activities I love.