I love the show, but I think Ian's the only lead actor with any real acting abilities. Nina can't act her way out of a bag (but this doesn't surprise me considering she's from Degrassi*

), and Paul is too wooden. But the story line is great, and I'm still really excited for the next season.
*Just to be clear, I also watch and love Degrassi, so I'm not really hating on it, but if I'm keeping it real those kids can't act.