(Part 1) Which Sims 3's "Mental" trait do you want back in Sims 4?

The Geek trait helps in finding rare collectibles, so that sort of covers the Gatherer trait. Some of the features from Nurturing are in the Parenthood GP as you improve the Parenting skill, plus there's the Compassionate trait that can be earned from that pack (if you already have Sims past the teen years you can cheat the trait onto them).

I could see some of these returning, for example Photographer's Eye could be included in the upcoming Moschino SP which includes a Fashion Photography freelance career.

Absent minded would be a great trait for my elder Sims; I do tend to change up traits a bit when my Sims age to elder to represent how some people have a change of personality; an Active Sim might become Lazy, or a Neat Sim turn into a Slob.