I wanted to create a serious topic about this. So please no flames, or immaturity, or sarcasm.

To cause hypertrophy do you guys feel that a variety of exercises is best, or performing the same exercises is best? For example if I wanted to cause hypertrophy in my biceps, would it be best for me to stick to a basic exercise like barbell curls---or change it up between barbell curls, alt. DB curls, incline curls, cable curls, etc.

What do you guys think and why?