I admittedly have a soft spot for Jay, despite his indirectly getting Jimmy shot. He was a big ol' cheater at first, cheating on Alex with both Emma and that random chick Amy. But the unintentional hilarity of Emma confronting Jay with "You gave me a social disease!" cannot possibly be overstated, and Jay's relationship with Manny was amazing and transformative for both of them.
Mike Dallas (aka "Dallas")
The boy was fine as heck. His storyline in the aftermath of Cam’s suicide was amazing and heartbreaking, and his relationship with Alli ended up being surprisingly great.
Zoe hasn’t been around as long as characters like Bianca, Holly J, and Paige, but I sense that we’re going to get a similar complex and well-developed character arc from her. I adored the way the show handled the aftermath of her rape and her eventual coming out storyline. It was also an interesting choice to not completely redeem her — she’s still kind of a horrorshow in Season 15, when she hooks up with Zig to “punish” Grace for not loving her back, it’s a bit bonkers. She’s not all good or all bad. She’s complicated and, so far, one of the most intriguing characters the show has had. More please!