I would very much like a gender preference option, and I would like the option to randomise that as well as choose for myself. I liked the chemistry option in Sims 2 because you could direct the traits to what you wanted. For example, if I had a sim choose facial hair as a turn on, I knew they liked men, and if they had makeup as a turn on, they were most likely interested in women. At the same time, there was a random element as well that led to unexpected pairings now and then.