Which world do you play in the most?

It depends. If we're going by the total amount of play time per world, well, I don't have any exact statistics, but my guess would be either Willow Creek or Windenburg, because those were the first two worlds I ever moved households into, all of which I'm still playing today. However, my world with the most played families and most played lots in general is Oasis Springs, closely followed by Newcrest and San Myshuno, and right now I'm playing a lot in StrangerVille and Brindleton Bay...