If you have playable ghosts and Spooky Stuff they can wear jack-o-lanterns made on the carving table on their heads.
I enjoy Movie Hangout stuff a lot. The expressions my sims make while watching movies are fun. I also like the colorful BB items. The popcorn maker is like the ice cream maker, coffee pot and tea machine - if you put it in your house your sims will constantly autonomously make some and leave it to go bad. But everything else about the pack I like.
Perfect patio may be worth it on a 50% sale if you build and want more hot tub options than the one they added to base game. I have honestly never used the other gameplay items in that pack.
Luxury Party was a must for me before MWS, for the buffet table and fountain. If you don't have MWS, they're good for weddings and parties. If you do have that pack, don't get it unless you really like the CAS items.