Pretty much carry over and improve upon many things the Sims 2 and 3 had like:
1) Aspiration failures bring back the psychologist
2) Fears and Wants replacing whims
3) Memories
4) Multigenerational and a tad less traditional family ties (ex step and half relations)
5) Fear emotion
6) Overlapping emotions
https://cdn.vox-cdn.com/thumbor/_aDrf4SlUoDQRmxKo8qd3nG85UA=/1400x0/filters:no_upscale()/cdn.vox-cdn.com/uploads/chorus_asset/file/3824542/inside_out_emotions-03.png Source: https://www.vox.com/2015/6/29/8860247/inside-out-emotions-graphic
7) Favorites
8) Turn ons and turn offs
9) Uncomfortable boosting negative emotions, this mod helped a lot: https://zerbu.tumblr.com/post/168552239715/the-sims-4-mod-uncomfortable-boosts-negative
10) More negative traits and lot traits
11) More trait slots
12) More romantic interactions such as Sims needing to look like they actually love each other like cuddling in bed, sleeping in bed cuddling, couple dances
This slow dancing mod is really sweet:
https://www.youtube.com/watch?v=VSJFQHD7X0g
Really nice thread.
