Why is Jennifer Aniston a movie star when all of her films flop? (Except “The Breakup” and “Marley & Me,” in which she barely featured as the third wheel in a love story.) Patrick Goldstein links to this wacky theory about the Aniston offscreen drama. I think the star theory of movie box office is overdone; people like Aniston (she still sells tons of magazines). She is a more than capable comedy actress, and everyone knows her name. Her movies flop because they’re almost always terrible movies. I liked “The Switch,” which in marketing looks like a weird indie film but in reality is a pleasant formula comedy — but it’s the first widely released Aniston-starring movie I’ve liked since “Friends with Money.” Before that, the last one I liked was “Picture Perfect” in 1996. (No, I don’t count “Office Space” as a starring role for her.) In reverse chronological order, she has made “The Bounty Hunter,” “He’s Just Not That Into You,” “Love Happens,” “Management,” “Marley & Me,” “The Break-Up,” “Friends with Money,” “Derailed,” “Rumor Has It,” “Along Came Polly,” etc. Terrible scripts, all. It’s kind of hilarious that Sylvester Stallone, at 60, is still a bigger box-office attraction than Aniston ever was, but that her movies are terrible isn’t really her fault, except that she apparently can’t identify a bad script. And romantic comedy as a genre is not that popular. Hollywood keeps making romcoms because, I guess, the kinds of people who make decisions like these kinds of movies, but the audience is rarely there. If “The Expendables” is any indication, mediocre-to-terrible unironic action movies are a better bet than romcoms, but who wants to make brainless sweat epics instead of bantering cute movies about dating?