I'd give them a vote just for their fries.

There are two just in Las Vegas. One at Fremont Street and another at Casino Royale.

I used to like Jack in the Box burgers, but they went away from the sesame seed buns to those awful what ever kind of buns the have now. I rarely eat there anymore, and usually don't get burgers there. I mean, they ruined the Jumbo Jack of all things! Same goes for the Ultimate Cheeseburger.
Appeares I'n not the only one that feels that way: https://www.change.org/p/jack-in-the-box-jack-please-bring-back-the-sesame-seed-bun

Used to have one here in Norwalk with a drive thru, one in nearby Stonewood Mall in the food court, One on Imperial Hwy in La Habra that had car hop service,and I believe there used to be one in Fullerton (maybe O-Din can confirm this one) but they're all gone now.

Edit: There also used to be an A & W / Long John Silvers in Manhattan Beach. Also Gone.

Replace KFC with Taco Bell and you've got that right!

The last LJS (not KFC / LJS or other combination) I saw was in Altus Oklahoma two years ago. There's one in Winslow Arizona just off I-40. But the last Long John Silvers I knew of in SoCal was in Riverside, and it's closed also. A group of us that go to Banning for tech days used to stop by there on the way back. At least there's a Raising Cains in Riverside to go to on the way back now.

This 100% ! They're basically the same business model In 'N Out except that they sell chicken strips instead of Burgers. Their fries a just okay, but the Texas Toast the serve is great. And you get quite a bit of food for your dollar there. The only problem is that like In 'N Out, they tend to have long lines. A new one just opened in Anaheim last week that I had to walk away from because the lines (inside and the drive thru) were so long.

Serious question: I don't think I've seen Sonic mentioned here. How are the burgers?
The nearest one to me is at least a dozen miles away. I've literally seen more of them outside of California than in California. If I go by one is it worth popping in and trying their food?

IHOB

Too bad I didn't see this post when it was posted. There used to be several A&W locations in my area a few years ago, but now they're gone. The closest one to me is 66 miles away now. I don't even remember what their hamburgers taste like any more.

We still have them here, but most of them in California are gone.

The impossible Whopper is okay, but it defiantly does not taste like the Whopper. It may have fewer calories, but it's only 5% less than a Whopper (Whopper has 660 calories, Impossible Whopper 630) and Impossible Whopper has a lot of added fats and sodium. Barely a more nutritious alternative. Plus it cost more.