Katurian really, really admires Edward, and craves approval from him in a way that may not quite be a crush, but certainly has similar sentiments. Edward's cynicism makes him feel more at ease with his own darker opinions. He's spent most of his life feeling like the oddball; he thinks Edward can actually understand him.

--Also, he enjoys feeling more like the "misunderstood genius" than the "man desperately in need of therapy." Sob. Thank you for the ego boosters, Eddie.