After playing for about 5 hours, I'm really enjoying it! My sims' needs generally don't decay as quickly as they used to, which for me has been a big plus. I've actually been able to give my sims some free time to develop things that aren't directly related to their career!
I'm also probably one of the only people who has found it easier to develop friendships. My only complaint with how the new social interactions work is that if my sim is out somewhere and they only want to talk to one specific sim, and another random sim walks up and joins their conversation, I have to stop talking to the sim I want to talk in in order for the 'third wheel' sim to go away. But on the plus side, my sims have lots of acquaintances from this happening!
I really thought I would miss CASt, especially after playing the demo. But now that there are more items included in the actual game, I haven't struggled to find colors/patterns for things that I want to use. I have a feeling that I will feel stifled by the lack of options, especially once I start in on some character recreations, but for the time being, I like what I have. And I'm willing to bet that EA will give us more hairs and clothing as expansion packs come out!
I set my sim lifespan to long so that I would have as much time as possible to explore before I started to feel pressure for her to have a baby, so I haven't gotten to see the whole no-story-progression, just aging, thing in action, but I am curious to see how I'll feel about that once some of my favorite residents start to die off.
I also find it slightly evil that Origin tells you how many hours you've played a particular game. It keeps me honest!