I mostly play Sunset Valley so:
Bebe Hart, because I feel sorry for her, living with her insane parents
Molly French, because she could cook, and her flirty trait would stir things up a bit
Gunther Goth, because I love his hair
Michael Bachelor, because everyone tends to forget about him and concentrate on his sister - he must have such an inferiority complex!
Xander Clavell, because he's a party animal