Once you get the basic technique and form it really is about confidence and comfort.   It's all about your personal interest and motivation. 

Just like your shouldn't let anyone force you into doing something your not comfortable with, you shouldn't allow people to hold you back.  Just remember not to ride outside your ability.

Me, I have been riding maybe about two dozen times and the blacks out here scare the living bejesus out of me.  Even some of the blues at the big resorts are very intimidating in spots.