My lots
As much as i would love to make houses full of elevation cheats etc.. they are horrible for game play. I try to keep mine easy to play because really thats what its all about right? lol.. playing the game. And the last thing someone wants is a home full of toddlers with ten different levels where they have to constantly rotate the camera to find everything .
So i dont think my future in creating lots for Sims 2 or even Sims3 will include crazy lots that are difficult to play!. I would love to make complex houses but again it is about game play and i keep the user in mind. If i am annoyed at a house a family is in .. then so will others be.