When I bought the Sims 2, it was inevitable that I'd want to involve characters I had written about. It started really basic and then grew more advanced. In time I was creating characters in the Sims 2 before I wrote anything.
After a while it was only natural to upgrade to the Sims 3. There are a lot of similarities between the two, but also some differences. Most characters look better on the Sims 3, but a few I like better on the Sims 2. So it goes.
Here are images comparing the Sims 2 and Sims 3 of a character along with text to see how they match up to what was written.