Yorra's habit of going into self-guilt is still a tick that friends and family help her work to reduce (doesn't fully go away but not bad enough to lead to some stupid life decisions like in her youth)

Kingston: his job
Ruth: being too self-effacing

For Ophelia, it's probably her hesitancy to take big risks or put a lot of energy into something- be it her career, social life, or hobbies. She eventually learns how to really come out of her shell and make new memories :^)

Astra does the thing where she herself trains against her Pokemon, which would be fine if she was a fighting specialist but she is a. electric specialist.
Nettle has a habit of trying antidotes on herself before using them on Pokemon since yknow... how else is she supposed to test more effective remedies.

Joltenne has most of her priorities straight so it'd be overall keeping her temper in check.

Jin does have her habit of getting a bit TOO excited during a fight. XD Which has caused more than a few problems in the past.

Odd has a tendency to overconsume caffeine, and as a result has trouble sleeping.

(He feigns ignorance with the "I own a coffee shop, caffeine's always close by" card, but actually tries to keep wired on purpose to avoid sleeping. He has some pretty awful reoccurring nightmares that, due to some quirks with his biology, can be painful in more ways than one)