Toughest aspirations?

In my short time in playing Sims 4, I've completed my fair share of aspirations, but there are a few aspirations I've never completed yet simply because it was a bit tough to reach. What are the toughest aspirations you think are hardest to complete? Yes, this includes all aspirations included apart from basegame as well.

I think in my experience, the toughest aspiration I've found hardest to complete is Party Animal, simply because I can't seem to get Gold on some of the social events because I'm most likely missing something critical to reach it.