My thoughts re: all these chains
Those I haven’t had/or had too few times to form a decent opinion:
A&W - There’s one right down the street from me, but there are much better FF options so I rarely go.
Big Boy - Isn’t this the same as Shoney’s?
Burger Street - Never had.
Burgerville - Never had.
Cheeburger Cheeburger - Had a couple during a stay in Auburn, AL but that was so long ago I can’t give a good review.
Friendly’s - These people fuck up breakfast - I can’t imagine what they would do to a burger.
Jack’s - Never had.
Kewpee - Never had.
Shake Shack - Never had.
Umami Burger - Never had.
White Castle - Yeah, they’re just the “Northern Krystal’s”, but I only ate there once or twice so can’t really rank them.
Really, not very good:
Dairy Queen - They’re an ice cream place and I’ve never had a burger that was no better than a stomach-filler from them. Skip the burger, get a blizzard.
Jack in the Box - Here in SA the JitB’s are low-rent burgers. Never had one that made me feel satisfied.
OK, nothing to write home about:
Checkers/Rallys - Not the worst, and at one time a good option, but there are a lot more (and better) burgers out there.
Burger King - They have their fans, but I’m not one of them. Love their croissanwich’s though!
Carl’s Jr./Hardee’s - Had one of these today. To be honest, I liked their fried chicken better.
Good, but over-rated
In-N-Out Burger - I just don’t get the love for this one. Not a bad FF burger, but the two locations I’ve been to (LAX off Sepulveda, Dallas I-35 south) I got a decent burger but nothing that makes me think “Dayum, that’s one fine burger!” And really, saying they are to burgers what Chick-Fil-A is to chicken sandwiches is an insult to Chick-Fil-A. And that’s a sentence I never thought I would write! 
Whataburger - Good value, but again, don’t get the love for this one. OTOH, they are open 24 hours, serve breakfast 24 hours (have a GREAT sausage and egg sandwich, btw), so they got that going for them.
**Decent **
Waffle House - Good and greasy, prefer their patty melt, a good “3AM burger”.
McDonald’s - It’s the taste of childhood, what can I say?
Krystal - There are times when you want burgers… then there are times you want Krystal’s. Don’t know what that says, but that’s the way it is.
Shoney’s - Small, but pretty good… and they have surprisingly good fries too. OTOH, haven’t been to one in over 5 years, but I’ve never been disappointed.
A cut above the rest:
Sonic Drive In - Pretty good and I occasionally go through phases where I go to Sonic on a regular basis.
Wendy’s - Used to be the best FF burger you could get, back in the late '70s, early '80s, but not so much nowadays. But… THE BACONATOR! Meat, bacon, and mayo… makes you feel guilty to eat one (but not so guilty as to make it impossible.)
Fuddruckers - Good, but one time my Dad and I ate there (back in the early '90s, in Fort Lauderdale, and we both got sick.
Freddy’s Frozen Custard & Steakburgers - Really, just a Steak 'n Shake burger, rebranded.
Smashburger - Like Freddy’s, a very good replica of the Steak 'n Shake burger. But S 'n S was there first, which is why they are ranked higher.
Mmm, this is a tasty burger!
Fatburger - Just discovered this place and every burger I’ve had makes it into this category.
Five Guys Burgers and Fries - A very good burger coupled with very good fries. Pricey, however.
Red Robin - Burgers are very good, and it’s hard to argue against AYCE steak fries.
Steak 'n Shake - The burger is very good. The sides are even better - chili, fries, boston baked beans. A taste of childhood that I miss.
Your “idiot ass” forgot (or didn’t know) about…
Bigz - A 2-restaurant “chain” here in SA that has the best burgers I’ve had in a restaurant. Unfortunately, they also cater to kids so it’s a LOUD place. But goddamn their burgers are good! I am also not a fan of “other” votes in a topic as important as this one, and since the chain doesn’t go outside the SA area, would really be a wasted vote for most of the readers here. But if they were regional or nationwide, they would get my vote, no doubt.
Backyard Burger - Yes, a very good burger. And waffle fries!
Big Kahuna Burger -
Will say, that did look like a tasty burger!
The one that got my vote
Culver’s - Really people, these are damned good. Wish they were a bit bigger, however their fries are excellent. And, unlike some of the restaurants listed, they are an actual “fast food” chain. 