Is it with mods or vanilla?
Vanilla, though I'd probably include some data packs for cosmetics and QoL improvements (i.e. Vanilla Tweaks)
Is it with friends or solo?
With friends (IF I HAD ANY T_T)
Is it with grinding or without?
Minimal grinding
Is it with cosmetics?
I think I'd stick with my skin
RPG elements?
No preference one way or the other
Combat?
Probably just the Ender Dragon, Wither, and Trial Chambers
BUILDING?
This is probably what I'd spend most of my time doing. I'd mostly build stuff like farms for iron, XP, and food, and awesome bases. All the things I build would be stuff I see on the internet, or stuff inspired by it