Furnace Alarm, sends out a firework or noteblocks when your food is ready. Don't want it to overcook after all :)

I love the working fence gate :) i will build it in my survival world

traps are cool for protecting, but piston doors are way cooler!

Maybe piston doors, I like making secret bases just in case someone decides to grief my normal base except in servers with land protection

I love to build farms in survival. If I can't be bothered to put up a building for something I actually build it compact and throw it in a shulker so I can just re-build the mini-farm later.

My two favorite designs for this have been my two-high flower generator and a cocoa bean generator. Before I started my new world I was working on a compact concrete generator.

Rainbow beacons, Redstone dungeons, ETC.

I enjoy making piston traps on survival servers. I put water underneath the trap so there isn't a way for them to stop moving to be able to tp

Secret doors. Both the expected ones, and the more creative ones.

I always love secret door ones!!