Yea they got their flaws, cant say I strongly dislike all, guess various strengths always brings various weaknesses and thankfully they'll learn their lessons lol

Evan Moriarty- his daring , live in the moment attitude makes him entertaining, spontaneous and resilient within a survival setting but can also make others in his life feel dragged into instability and emotionally betrayed.
We are introduced to him as an optimistic big brother when the world becomes a hellscape but as we see him interact with other young men it's clear he's a play boy. Those who hope for something more, he takes them for granted. He also gets his fix from gambling with death (risktaker), dragging his little brother into situations without thinking about the consequences, should things go opposite.

Owen Moriarty- he's a 12 year old kid prolly understandable. Having a more sheltered upbringing, he's accustomed to his parents giving a final approval and mostly keeps himself back from many opportunities. With the brothers stranded from the parents he sees himself left with no other choice but to listen to the 'next adult in family', his big brother Evan. While he loves his brother and tries to keep up even if not by choice, deep down some of his father's negative sentiment towards Evan (he witnessed in 1st episode) remains in his conscience. Owen has a hard time accepting he may not be able to reunite with his parents and begins to blame Evan much like his father did.

Quim Kidd- At 19, he is a quiet guy who much like Owen, looks to his older cousin Quest and uncle Braden to take charge (prior to April 5th, he lived with them on his paternal grandparents' farm after both his parents died in an accident at a young age). Fair enough on April 5th, he's shaken after witnessing his grandparents turn into monsters, but while someone like Owen would be pushed to take action, Quim would rather run away, burst into tears and hide. His child-like innocence, years of being bullied in high-school and failure to 'succeed at anything' leaves him with an inferior self-image and he'll easily trust anyone who gives him attention.
While Evan never knew him personally in HS (Evan was a few grades above) he was Quim's 1st crush and recalls a day when Evan rescued him by beating up the bullies (Evan on some occasions playfully manipulates Quim's adoration of him with little regard to his feelings). His gullible nature can easily work against him but on positive note he's the antithesis of "Mr. play-boy Evan", prefers to remain true to the one he loves.