I'm not addicted to comics, but I really like Joker. I tried to represent his psychopathy using just a staring eye. He doesn't even notice Harley is there for him, he just cares about you. It's like he was a shark, with that small and fixed eyes and dozens of showing teeth, like at any moment he could jump off the screen and bite (or kiss, who knows) you.
This is my favorite illustration so far.
I did a traditional outline, with pencil and nankin, and the shades in Photoshop. I liked the fact that at distance there's just lines, but closing in there's an traditional comic art feel.