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

I suppose 'unstable' covers it, but you forgot about 'histrionic' (or something like that - I don't remember exactly what it was called). 'Dramatic' maybe? Also the 'technophobe' and 'serious' traits.

I'm with the others on 'absent-minded' - I never used that one in S3 because my Sims constantly dropped things from their queue, anyway. Not something I wanted to encourage.