DC Heroes: Dick Grayson, Bruce Wayne, Kal-El, Terry McGinnis Barbara Gordon, Stephanie Brown and there's few others I don't mind but they wouldn't be favourite. 

DC Villains: The Joker, Hush, General Zod and Smallville's Lex Luthor. 

Marvel Heroes: Uh... Ultimate Spider-Man (Comics not TV series), Netflix's Daredevil/Film Daredevil (Don't shoot me), MCU Thor, MCU Iron Man and MCU Cap. 

Marvel Villains: I guess MCU Loki and Film Kingpin (Again, don't shoot me).