Island Living adds 2 lot traits, with 1 lot trait locked and cannot be assigned. Patch 81 adds 2 lot trait into the base game. Get Famous adds 3 lot traits related to celebrity. Jungle Adventure adds 2 more lot traits related to jungle vacationing.
Cats & Dogs adds 6 lot traits related to pets. Vampires adds 3 lot traits, all related to the primary theme of the game pack. 18 traits are added with City Living expansion pack.