Your favourite kits?

My favorites are mostly CAS but I do really like a few of the build/buy ones as well. 

For CAS:
~ Goth Galore is my favorite. I really needed all of these designs and use them a ton. Before this pack, I had to get really creative with my gothy Sims and urban Occults. This pack filled a void. 
~ Fashion Street is awesome, I love the Indian/Bollywood designs and use them for Genies, Romani and fantasy noble Sims. This kit is so unique and used to be my top favorite.
~ I have to give 3rd place to Carnival Streetwear. Thought it would be Grunge Revival, but turns out, I use more pieces from Carnival. Love the gothy makeup and fishnet items as well as the little heart sunglasses.

For B/B: 
This category was a lot harder to choose favorites because I don't build much. I do, however, download a lot of builds from the Gallery and often do a little bit of tweaking or renovating, so having access to some of my favorite pieces was kind of a necessity for that purpose. Some kits I buy for specific items.

~ Giving the top spot to Storybook Nursery. This is kind of weird for me because I don't tend to focus on younglings, but I so desperately needed Occult/fantasy furniture in black and bolder colors for my Occult offspring, that I was really excited to get this. It kind of makes me happier to play younger Sims now. 
~ Giving second place to both Castle Estate and Courtyard Oasis. Castles are right up my alley, so anything to boost those builds is happiness. Courtyard has Moroccan designs that I'm so into, as these were some of my favorite furniture pieces back in Sims 2. 
~ Oh, I don't know, I think I have to give this to the Party Essentials. But not because I particularly like the Kit as a whole, I actually don't think it offers much, but I really, really needed those fog items. The fog machine and misty dance floor...I had to have them so I can put them everywhere.