Dr. Horrible/ Billy in... all the acts. It's too difficult to choose one, the first act was just so sweet and it let us get to know out protaganist for who he was with 'My freeze ray' and out antagonist for who he was with 'A mans gotta do' Act 2 messed with my feels... poor Billy... and act 3... it was epic but... Penny.... ;^;
Loved him because he is just so nice, much too nice to be a villain. I felt so bad for him because all he wanted in this world was pag-ibig and to improve the world, but, Captain Hammer. The 'Superhero' jerkjock, led him to be who he really wasn't meant to be. I was able to relate to the shy awkward nerd Billy because well... he reminded me of... me. So... Doctor Horrible all the way!