Perhaps the most unpopular opinion you will ever see but I can't stand Julia's character after the first season. She was ok at the beginning but turned a bad person (leaving alone her longtime best friend just because it wasn't cool anymore to be a "loser", making out Justin despite the fact he was her longtime bf's boyfriend, not being a good sister to Claudia especially when was most needed, refusing to move on when Charlie was offered a really good job in other city and he just wanted the best for everyone, cheating Justin with Griffin only to make his life kind of miserable, etc.).
On the other hand, Claudia Sallinger was completely mistreating by her siblings, in my humble opinion. One particular moment I remember is when she was the only one who went to Bailey's first match just to be completely ignored by him (ok, he was on drugs but it was not an excuse). It was a very sad scene. On balance, I'd say she was the only Sallinger who took care of her family because even Charlie and Bailey turned kind of mean and superficial.