In a large bowl, beat the cream cheese, sour cream, 2 Tablespoons sugar and vanilla until smooth and creamy. Lay out each tortilla shell and spoon mixture onto one side. Sprinkle on chocolate chips. Roll up tortilla. Melt butter and, in separate bowl, mix together sugar and cinnamon. Butter taquito and roll in mixture. Bake at 350 degrees for 15 minutes. Yum!