Ah - it's such fun to manipulate their little electonic emotions - the multi-level, multi-gender love dodecahedron is a personal favourite. That's the one where two Sims stand in a room, and no matter who walks in the room, there's an instant fight. Fantastic - Hot Date made it so much easier to set this stuff up.
I must get Vacation and Unleashed - the concept of uncontrollable pets is almost unbearably funny.