What shall I do?

Moin, I've been on this Minecraft survival server for ages, now I've got everything, but I would still like to do something, do you have any cool or creative ideas for me?

Build a small house with lots of secret passages (levers and buttons).
Build a jump n 'run

Try to build your own biome

Build fully automated farms
Build your own village
Tidy up boxes (or build a fully automated warehouse)
Build a second base
Build something in the Nether

Have a look at LarsLP on YouTube, he used to have many automatic farms ect. Made.