I love playing the Sims 3...there's so much things to do...
1. Make a REALLY fat sim, and then make them work out a lot, watch them get slimmer.
2. Make friends with a criminal and invite him to your parties.
3. Build a house with no toilet in it and watch.
4. Build the tiniest house ever, like a 1 meter house.
5. Do the opposite of what the instructions tell you to do.
6. Make a household of 8 sims, and make them all pregnant at the same time. Watch them giving birth at the same time.
7. Sleep with your neighbor's husband/wife.
8. Design your sims to look like a family of hookers.
9. Make a really absurd and morbid looking sim and get him/her to flirt with a hot sim xD
10. Get 2 gays/lesbians and marry them.
11. Turn the whole town gay/lesbian.
12. Build stupid houses all over the town.
13. Knock down your workplace and laugh.
14. Rob houses.
15. Argue with fat sims.
16. Bash the really pretty sims.
17. Join a household and don't get along with anyone.
18. Sleep with your boss.