Self bagging only pretty much where i live.
The cashiers at lidl are so fast it's hard to keep up.
I just stuff everything in fast as possible trying to maximise damage; this can also save on chewing time later.

But I only have to carry it as far as my bicycle - and I do sometimes need to fish out and reorganize heavy stuff at that point to keep the pain-ears vaguely balanced.

Though it is quite fun to try with 6-7 litres of liquids on one side and 2 carrots and a lettuce on the other.
If it's not too windy I'd just do that - shopping is boring.

If I was walking farther I'd take a big rucksack and yeah I'd probably pack it more systematically.

I can understand car users not bothering to organise though.
Unless you're driving 100km through the desert and think anything frozen wil melt.

I don't organize them with a mind as to how they'll be bagged, but I usually put vegetables down first as they take the longest individually to process and put fragile things like eggs last.

What I do wonder is if the cashier is judging me as to the quality of my purchases. Like if it's all fresh vegetables and grains do I get an A? If I add in a frozen pizza does the score drop to a B-? If it's just trash like chips and processed junk do I get a D?

Items in perfect order of robustness on the conveyor, but more than one bag...

I am way lax. No pre-organization really at all - but most of the time I also bag them myself with my own bags. I wlll somewhat organize them during that process.

I tend to do my primary shopping at a place where you bag your own. The order is generally produce and bulk items first (it tends to be the bulk of the purchase), then frozen things, boxed/canned things, and finally squishy things like bread, eggs, and uh, delicious Hostess fruit pies.

Heavy stuff in the backbag (Eastpak Student style),
Others stuff in the two handbags,

i'm Urbanized.
When i lived in a rural zone, wasnt the same at all.

If you have a big enough purchase, it gets pretty impossible to rearrange on the fly.

Nope

I tend to shop at grocery stores where the cashiers are paid relatively decently and have their shit together (Aldi, Lidl, Costco), so I often don't have time to do more than shovel everything out of the cart top-down as quickly as possible before they're already scanning it.

Not really

Depends. Aldis, not much. Walmart I absolutely do. Self check, a little, but only use it when only have a few things.

I don't as the cashier are usually kind enough to consider that when they pack them anyway. At least I never had issues with that before.

Reverse alphabetical, duh.

Can’t have my aardvarks at the bottom of the bag.

Yes, I live a short walk from the grocery store so I normally just put everything in a large backpack to carry it home. I organize what I'm buying in the order I want them so the heavy large items are on the bottom and the fragile items on top.

Fuckin... No!

I also tell the cashier that they can stuff it any which way so they don't stress.

Not really, no.

I usually only have a backpack, so I have to make sure everything fits in that one backpack. So yea I order my stuff

my mother was always weird about putting all the same items together on the conveyor belt, as if not doing it were some incredibly rude faux pas.

there's no way it possibly makes any difference to anybody. I do try to make sure that the crushable items go last however