Whoever shows the most fear, whether it be young/old, male/female. Target gender or age doesn't matter to me when it comes to scaring, I'm all about equal opportunity. However if I can get one of those "tough guy" types. They're the most satisfying to watch scream and jump around like a sissy. Especially when they are with their girlfriend/wife and said girlfriend/wife are not the ones being scared but the ones laughing at the guys.