Spent a few hours building some characters and designing a house, both with equal measures of enjoyment and frustration. I enjoy how robust the options are in the game, even with just the base game, and its easy to lose yourself in the creation tools, but the game seems all too willing to undo the progress that you've made without a moments notice. A couple times that I was playing, I encountered UI failures that had dire consequences; like importing a Sim completely overwrote the one that I had spent the better part of an hour working on, and you can't undo a gender change for some reason (and clicking it back bizarrely changes your character slightly). Despite these failings, creation and generation remains one of the most entertaining parts of The Sims 3.
Simulation/Life Development Sim