I'd say that 90% of my campsites require some sort of leveling. From years of rock and alpine climbing/backpacking I like to have tools/equipment that serve multiple purposes. Still go with a selection of 2x wood scraps of varying lengths/widths. I can use them to get unstuck if the occasion arises, help with unstable jacking locations, combine with rocks to level in severely uneven areas and when they get tired they make a nice addition the campfire.
I've also more recently combined technologies by fine tuning with my air shocks to get the perfectly level sleeping platform and I hate seeing the olive oil collecting on the low side of my skillet. Maybe its the carpenter in me....