I only use a 3D objects texture pack for the visible ladders and better shapes of objects while I parkour/build. Just because I mostly build for parkour at the moment, and I want to build and see things from the perspective of a player who doesn’t use texture packs and make sure things look decent that way.
When I play other game modes, I really like Better Vanilla. Keeps things nice and simple, as stunning as the 256x packs can be.