As Rory's Jess in "Gilmore Girls," Milo Ventimiglia shouldered the burden of being one of teen television's most scrutinized and most exasperating love interests. "Everyone wanted to find someone like Jess," the actor, who now stars in NBC's "This Is Us," recalls. It may have come down, really, to a few basics: "If you got that hair, and you got a cool jacket, and you got a book in your pocket, then, well, you must be good for a girl."