One reason for the opposition to the thrice-married Crown Prince is his reputation as a playboy.
In 2009 a video emerged that was apparently taken at a birthday party for his poodle, Foo Foo, and which appeared to show his wife, Princess Srirasmi, wearing nothing but a G-string.
Others apparently simply believe the Crown Princess would be easier to control than the Crown Prince, who is considered a maverick and who may sweep away many of his father's courtiers.