Lvl 3 Perception is the best!
Being able to walk through event blockers, and freely explore the expedition areas- This was a game changer for me!! I achieved it late game, but now I want to try to again and get it as early as possible. Thank you for this very helpful guide!

Thanks so much for this, it's very helpful for planning life routes :D

I was looking exactly for this. Thanks.

It's even freakier, because nearly any activity gives +1 friendship point with one of the characters, and that -1 stress is applied after the +x stress of the activity. So basically the stress level goes to 100 but then immediately bumps to 99 at the end of every month, no gifting necessary.

Lvl 3 Empathy is bananas!
Basically you can completely remove the need to rest, since you can just give a gift to someone (doesn't even need to be a favored gift) to bring your stress down to 99... which is enough to do an activity instead.