Since you liked the random facts about the Ineffable Husbands in my the Sims 4 (here), I thought I could tell you which personality traits I gave them:
Good: they're happy when the Sims around them have positive moods, they can discuss World Peace and donate to charities.
Foodie: they love good food, but become uncomfortable if they eat bad food (Azi, for example, doesn't like water, because it's too plain) (we love a fussy angel).
Bookworm: they're very happy when they read, can analyse books and discuss them (and leave them EVERYWHERE).
Creative: they can share their ideas and are easily inspired (after flirting with Azi, they usually trim the bonsai tree into a heart shape).
Hot-headed: they should tend to become angry...but Crowley actually doesn't. I mean, they're always angry as soon as they wake up, but it lasts literally 2 seconds. However, they do get riled up if other Sims start bothering them.
Jealous: they gain confidence from being around their partner and get tense if they don't see them for a while (yes, even if they're in the same home 24/7). At the beginning I was afraid this trait would be annoying, but I thought I'd give it a try and eventually change it if I didn't like it. However, I have to say it's actually pretty cute, as it's not toxic jealousy, but more like a kind of protective affection.
For Aspiration, they both have Soulmate, which explains why they're so romantic with each other, and they also fulfilled it! They are now Companions, which means they have special interactions with their spouse that "help ease the trials of life".