All excellent ideas (speaking from a California dude). I would remind folks though that California is pretty big place -- so depending on time, be careful not to "roller-skate through the Louvre"...as they say. Here are some of my thoughts -- hope I don't tick off any locals...
One big thing to keep in mind is the weather. Southern California -- from San Diego up the coast to just North of Santa Barbara is what I'd consider the warmer half. From SB, North you will start to feel a cooler sense of things. The ocean is colder, the beaches more prone to rocks and fog. Just as pretty, mind you, but just cooler (generally speaking!). The notable exception is Santa Cruz which can often resemble southern California.
As for driving and sightseeing: San Diego and its northern areas of La Jolla, Del Mar, and Solano Beach are really nice and worth checking out. The golf is good. There are several public courses that are pretty and affordable. (At least they were when I lived down there). One you should try and play is Torrey Pines just out of La Jolla. The home of several PGA events, it is open to the public and not overpriced like many famous courses in California (Pebble Beach comes to mind). Not that tough either (from the whites anyway!)...
As you make your way up through LA, you start to do some trading off: there are many huge attractions worth checking out -- but you will likely be snarled in traffic or find yourself on a wrong freeway wondering why you ever left San Diego... Hollywood, Rodeo Drive, Sunset Blvd, Universal, museums, Malibu, etc... all worth a visit if you have time. If not, snap a few pics and get out.
I would then cut over to PCH and take Highway one from Santa Monica up to Port Hueneme. This is the crown jewel of southern California's coastal drive (I think). Before you know it, you'll be up to Ventura and Highway 101. Next stop -- Santa Barbara, If there is one place in California worth seeing, SB is it. OK, I confess, it is my hometown. But there is a lot to see and do there. Several public courses in the area that are nice and enjoyable. Check out the Queen of the Missions, Mission Santa Barbara, State Street for shopping and Dining, Stearns Wharf and the beaches for fun. There is a reason why so many stars end up in Montecito, possibly the most perfect place, just south east of SB.
From SB, I'd head Northeast to the Santa Ynez Valley to experience the wineries and Solvang, a Danish town transplanted in California...Its neat.
Next, take the 101 toward the Pismo Beach area, and if you are itching to stay along the coast line, take Highway 1 from Morro Bay up to Monterey. Here is some of the most spectacular scenery in the world. If you forego this windy -- as in curvy- stretch, 101 is a nice drive up to San Jose and the San Francisco. Not overly breathtaking but not a bad way to get to the Bay Area. A third way is to go from Paso Robles over to I-5 and up the 5. Straight and sort of boring but the quickest way to get to SF from the south. There is a ton to see in SF, as you are no doubt aware. Buy a Giants hat -- since it will be another 40 years before they win again...
So, I need a break (you all do too I am sure...) AND get this, thats only half of California! The true Northern California runs up the coast to Oregon and is equally as lovely... like I said -- Big Place!