What is your favourite Pack?

That's tough. I'd probably agree with the post below Serendipity0578​ and say Cottage Living, which has a great number of things included in the pack. 

Cottage Living is still my favorite pack overall.  I love everything about it, the animals, Henford-on-Bagley, the new harvestables, canning, the simple living lot trait, cross-stitching, the craftable treats, errands system.

Honorable Mentions:

• Life & Death
• Horse Ranch
• Get Together 
• Realm of Magic
• Werewolves
• Tiny Living
• Crystal Creations

It's really tough to choose just one because I enjoy so many packs for different reasons. Some of my favorites include Seasons, Cats & Dogs, Cottage Living, Horse Ranch, Growing Together, Parenthood, Lovestruck, and Hobbies & Business.

This is really tough but I'm gonna say Life and Death.

Soul's journey

Bucket list

Spooky world

Festivals

(Career)

CAS aesthetics

Oh, wow, you mean I have to choose? Okay, you talked me into it. Get Famous.

If I was going to pick a pack ONLY for the world, it would be Wedding Stories (I know, totally broken gameplay for weddings but the world is SO beautiful) But for gameplay, it would be City Living, as there is always something to do there. And sometimes, a sim just can't afford to do anything more than rent.

I completely agree with:

• It has some of my favorite pre-made sims.
• It made me get into building in the game again, it's easier to just start building an apartment than a whole house.
• It made me get into playing again around that time, I enjoyed living in different apartments a lot.

I too took such a long break from the Sims but when City Living came out I got sucked right back in

Haha I totally changed the rules :P

My favourite Pack is Cats & Dogs. 

My favourite pack is realm of magic. (the first post doesn't say expansion pack, so game packs are allowed I guess) I love my spellcasters. Just recently I visited an art nouveau house and I absolutely love that building style. Perhaps enchanted by nature might replace this first position but it's too early to tell yet.