Personality

I'd really like an in game serious trait as @dreamprisoner mentioned. It could default our sims to "fine" almost always with buffs having little effect... if any.. that would go for any mood buffs though not just good ones. I play a lot of characters that could use a hardy serious trait.
I like the liveliness of the sims but you can't build a dour, serious or apathetic character at all.
I'd like some traits I don't think we'd ever see also.... so I won't mention them here.
I'd also like a committed or devoted.. however they want to word it so that when they are in a relationship they are bound to their SO, spouse, bf/gf ect.