but as long as he was well fed, he wouldn't have to worry about losing control... all of the control issues came about because of injuries or lack of feeding....
He didn't lose control in the salon... all those women wanting his sexuality...
A lot would depend on the vampire in question, not to mention their own outlook and personality.
White Court vampires seem to be strongly affected by their choice in food. Thomas and Lara love sex, and expressing their sexuality. Thomas even defined his salon by a false front of his own sexuality.
If fear or misery are your food, what does that do to you, mentally and emotionally? If you need people to suffer in order to survive, unlike with lust, how does that change your view of people?
Going to a horror movie might be like eating a pack of salted crackers to stay alive. How many decent horror movies come out? How does the fear they create compare to the fear of a young woman walking home alone at night, who you could easily follow. She might catch a glimpse of you here and there, but you can move so fast she'd never notice you reach out to brush your hand across her neck. Maybe she lives in a bad neighbourhood? Maybe someone was raped near where she works. Maybe she has nightmares of the things that could happen to her, and all it takes is your shadow behind her to taste that.
Fear is very different from being scared.