Which one? We have so many: Napa, Sonoma, Mendocino, Sierra foothills, Paso Robles, Santa Barbara, Lodi, Santa Barbara
Joshua Tree is one of my favorite places, period.
There is also a ton of things to do/see in Los Angeles that have nothing to do with TV/film, things that I think are much more interesting. The TV/film stuff is so touristy and, in my opinion, mostly cheesy as hell