Buffet behaviour
There are two types of people in the world. Those who will try things and those who won't. Think about a buffet - some people happily load up their plate with a little bit of everything, going back for more if they find something they like and some people will actively avoid certain items and carefully compile their meal.
The truth is, at any point in time we either try new things or we don't. Those who won't are scared of making a mistake and are protecting themselves. The trick is to make people aware of you when they are in the mood to load up their plate.