Usually mine come from stories I've read from growing up on. Movies, TV shows.. ect. I tend to use certain archetypes over and over again because they appeal to me. Sometimes the characters are a composite or taken directly from my favorite stories and kind of expanded through some sort of fanfiction in my head and in the game.
Last night I was watching a movie.. and I suddenly wanted to make the male and female leads in that movie. So I opened the game on the side and just started working on it. I thought they would make good sims and I'd be able to expand their story later. It isn't unusual for me to be inspired in this manner.
