I add, however, that Dominos’ chicken, pasta, and dessert items are disgusting. The salad is edible, because it’s basically just lettuce.
If you mean what I think you mean, then it’s something they physically put onto the crust, and you can ask them to leave it off.
As an indication of ubiquity, from a Canadian perspective:
Pizza Hut: They’re everywhere. I don’t like 'em.
Domino’s: They’re everywhere. Variable quality. Has sometimes been good.
Little Caesars: Not quite as popular, though they’re around, pretty much everywhere. Reminds me of my college days. Haven’t had it in a very long time.
Papa John’s: Papa who? 
Needless to say, several local pizza joints are far better than any chain. One of the oddest setups is a decent Italian restaurant that operates a takeout service out back. Most of the takeout stuff is of course exactly the same as they serve in the restaurant, except their wonderful takeout pizzas are unavailable in the restaurant! Amazing thin crust, generously loaded, and oozing garlicky goodness.
ETA: Just saw this. The “garlicky” I’m talking about in the local stuff is nothing like this. It’s more like a deeply simmered garlic in the sauce itself.
A Domino’s opened up near me, so I decided to try them. On a scale of 0-10, I’d give them maybe a 2. I ordered pepperoni, sausage and onions… and I couldn’t taste any of them. All I tasted was salt.
Back to Pizza Hut.
I voted Pizza Hut. I don’t think we have Papa Johns in Australia, and I’m assuming the other two are more or less the same here as they are in the US.
I think that there’s at least four scales of variability: variability in time (they get worse, better, and then worse again, as recipes get altered by corporate edict), regional variability, variability between franchises, and variability from one pizza (and pizza jockey) to another. But yes, tastelessness tends to be one of the hallmarks of chain pizzas in general.
The latter are “Pizza Hut Express,” though. At least in my area, “Pizza Hut” is full service, and “Pizza Hut Express” are those takeout joints. It looks like for my area, 15 stores are present, eight of which are Pizza Hut versus 7 Express.
You’re saying there are still Pizza Huts near you that are sit down restaurants that serve pasta and such as well? Here they dropped the “Express” designation because they’re all delivery/carry-out only. I have seen a eat-in Pizza hut in over a decade.
Yes, and like I mentioned upthread, serve the all-important wine and beer!
I actually only tend to notice the Pizza Hut restaurants when I drive by, because they’re still the distinctive, Pizza Hut like buildings. I never actually see “Express” stores, likely because they’re occupying strip malls, and I simply don’t see them unless it’s a strip mall that I’ve had some business going to.
Couldn’t have said it better. Or sooner. 
The weird thing is the Pizza Hut a block from me was in the location of the eat-in version I used to frequent 30-some years ago - they simply walled off the restaurant and used the carry-out area. About three months ago, they finally moved into a strip mall across the street using a quarter of the space.
Yeah whether or not PJ overtook LC, LC is very prominent in ads on TV, doesn’t feel like it’s big three but a big four.
I live in a place (inner NY area) where ‘authentic local’ and ‘yuppie coal brick oven’ type pizza places are the main competitors. Or at least few people admit they prefer national chain pizza. But Domino’s has still done well from their little store in town for many years. You have to go further for Pizza Hut, and the other two might have outlets nearby but I can’t recall where and have never been to either Little Caesars or Papa John’s either near home or when travelling.
I’ll admit I like Domino’s at least as an alternative to the other two sometimes, but other family members won’t have it, and even the two nearest ‘authentic local’ places face some opposition (can’t go to the one a couple blocks away with one grown kid because she worked there as teenager and doesn’t want to go down memory lane 
) so we usually eat ‘yuppie coal brick’ when we go out for pizza. When we order it in it’s usually from the second closest ‘authentic local’. But again if up to me I’d mix in Domino’s sometimes.
Pizza Hut for taste, but Papa John’s delivers.
None of em.
Pizza Hut for the pizza. Dominos for the sandwiches.
Papa John’s can blow me.
Unfortunately a pretty severe allergy to one of the common ingredients in virtually all commercial pizza sauces means it’d be nigh on suicidal to eat a pizza since even white pizzas are out given the likelihood of them using the same pizza cutters and pans means contamination is too great a risk, so it’s been 18 years since my last pizza that was made anywhere but my own kitchen.
And the smell of Pizza Hut pizza still makes me weigh whether a potential trip to the hospital would be worth it.
Pizza Hut quality went way downhill when they started using frozen dough. Pan Pizza (their flagship product), which used to be mixed in-house every morning, now arrives at the store in frozen disks and is virtually unpalatable to me. I usually get their hand-tossed crust, but I prefer Domino’s pan crust.
Our local Domino’s location has a bad habit of pre-making hand tossed crusts far ahead of time. The crust completely dries out before they make a pizza with it and the result is horrendous.
Oh, I hate that. When I was a delivery driver, the manager used to do that - make a bunch of crusts before the rush and mist them with a sprayer. They never came out well. I never did that when I managed.
That kind of highlights what can suck about these threads - variation between stores in the same chain. Another example: we had a manager who was infamous for over-cooking her pizzas because she preferred a browner crust than the standard “golden brown.” I used to get calls all the time from people wanting me to deliver in her area (a no-no called poaching) because the pizza was better. What we think of the individual chains is really based on what the local mgmt is up to and that can vary a lot.
Do they still have “one-three-double-one-double-six” for Pizza Hut delivery in Australia?
Actually, I haven’t had a pizza delivered in decades - ever since the local Domino’s kept giving its drivers the wrong directions to my house (I live on X Street, but the drivers were told to go via South X Street, which has a dead end without connecting to X Street).
Of the pizza chains, assuming I had unlimited money, I like Dominos the best.
However, I mostly get Little Caesars because $5 pizzas. 
I quite liked Godfather’s Pizza as a kid, but they don’t have one near me. 