You mean when you hover with the mouse over them, same as we can see their name and age?
If you are open to mods, Show/Search sims info can do something very close to that. Takes two clicks only and you can see everything (including hidden traits like handedness, if you wanted)
The new patch did some changes into that direction. Especially Neat and Goofball sims seem to behave according to these traits more frequently, and bookworm sims have been seen to carry books when they walk by (although I'm not sure that is the trait, Eco Lifestyle with the "Back to the old times" NAP can cause that, too).