We are childfree by choice, my husband grew up going to Disney, and I went twice when I was a kid. He was used to commando style park days (his mom would take them on "death marches" to do everything - and yes their entire family refers to them as "death marches").
We take things at a much more leisurely place. We love wandering through all the shops and gardens: there are beautiful gardens/ponds at Japan, Canada, China for example.
Bars and lounges are our thing as other's have suggested: Lapu Lapus at Tambu lounge, dinner/snacks at the CrewCup, and adult slushies in France. Explore downtown disney/disney springs - go to the bars at the restaurants and order an app.
We also look at other resort menus and hop to resorts to try the restaurants (we know/stay at deluxe resorts or DVC so we haven't spent much time at the mods or values). We have also played "bus roulette" - we take the first bus we see at the pickup site and go explore that resort.
The FP+ system works great for us: we don't have to get up for rope drop (except EMH at MK) and can ride what we want, when we want. Admittedly, we are DVC owners so we go regularly (less pressure to do everything because we'll be back).
Mini golf is on our list but we have never quite made it to mini golf.