I think it would be interesting with ways of not all sims being able to reach just any goal. We got infertility, which is fine. I think some sims should simply be too unlucky to reach goals as quickly as others. Or we could have a genetic intellect, making it harder/easier to build skills etc. (the genius trait is not enough - ppl can be intellectual without being a genius. And can be less smart without being a goofball).
A system of (genetic) talents?
Most of all I wish most careers were built differently. Anyone can easily get the same promotion, in RL many of us do not end up as CEO. We should need to apply for a job, just like we apply to University. A job should claim your sim to have multiple skills (or other factors, relevant). Whenever there is a promotion it could be an option - yes or no. I don't mind promotions to come often if there is a way to slow down by turning down the offer. Maybe there could be added specials like "you are offered a promotion, but it would need you to move to Oasis Springs before accepting. Interested?". Or "We offer you the job as our Tourism Manager, but we must ask you to visit Selvadorada before accepting". Or - "Want to become our next top chef? Bring a top quality xxx dish, and the job is yours!". These extras would of course get tiresome if they were on every promotion, but a couple times per career would be fun.
I'd also like a system where a sim got a possibility to switch careers by applying for a higher job in a different career without starting from scratch. I think we had that in TS3, no? It would also be cool if not all careers were hiring at any time. Make it a tad harder :)
