I think I love this character since he's the most easiest character I've known to relate to, I feel like I could meet someone exactly like him and at times I feel like his thoughts mirror my own. He's probably one of the most human and realistic characters out there whilst not being boring at all. If I could listen to his thoughts all day, trust me I would :P
How can you not love this guy? Oh sure he appears evil but you can't help but love his phone stomping antics. He's a fun villain who almost seems to be in this all just for the fun of things rather than revenge or any other cliche reason.
Come on, it's near impossible to hate her. Such a fun character who's makes any conversation fun with her sharp tongue and quick insults. She's got a delicious Tsundere attitude but what makes it great is that she's aware of it, and often uses this to her advantage. I love every second of her screen time and hope we get to see more of her.
I have many others but these main 3 are what spring to mind for me.