This is the most important thing to know about wine. Drink what you enjoy.
I do have to comment that the label "California Wine" is too broad to be helpful. There are 139 Appellations in California. All vastly different. Each winery in that Appellation is vastly different. Each wine at those wineries is vastly different.
I favor the Lodi Appellation, mostly because it is 40 miles from my house, we buy our wine at the winery (haven't purchased wine in a store in years) and often the person pouring in the tasting room in the owner of the winery. There are over 85 wineries in Lodi, most small operations.
I have been to Lodi wineries where there wasn't a single wine I liked. I have yet to be at a Lodi winery where I liked every variety they bottle.
And a dirty little secret and Napa wine, unless the bottle says "Estate" on it, the grapes likely were grown in Lodi.
And one California winery is probably responsible for more people getting interested in wine. That winery is Gallo. Most folks move on from Gallo, but their product and marketing have had a huge positive impact on world wine consumption.
Honorable mention to Bronco Winery from the Lodi Appellation, makers of "Two Buck Chuck" the highly drinkable and popular wine sold at 530 Trader Joes.