The old topic that gets beat to death is which kind/size/type should I buy/use. It comes up in specific threads and it comes up as parts of threads on related subjects. As a result there are dozens of recommendations scattered over dozens of threads.
So, how about we consolidate recommendations here. NOT AN ARGUMENT as to what kind or type or size one should use; just your favorite that people can research and like it or not.
I will start, I have two Carry-on bags that I like depending on the trip:
Most trips I carry about 20lbs of clothes and "stuff" divided between a Carry-on and a Personal item
Rick Steves Classic Back Door Bag
Basically a backpack. I have been carrying this for going on 15 years.
Packing Scenario" Carry-on (2lbs) + Stuff (15.7lbs) = 17.7lbs / Personal Item (1lb) + Stuff (4.3lbs) = 5.3lbs.
Good:
Indestructible, light (2lbs) and at 21 x 14 x 9 (if you dont overpack it) a legal carry on for every major european and US carrier.
Downside;
I am getting a bit old to carry 17.7 pounds on my back.
It becomes a bit difficult to deal with the bag and the "personal item" which is essential for the way i pack as even with a light bag, I still need to put a few things in the Personal Item to keep the bag under 17.7 lbs on most trips.
Bric's B|Y ULISSE 21" SPINNER https://bricstore.com/p/by-ulysses-21-expandable-spinner-black/
A hard side spinner and my goto bag for the last four years (about 10 overseas trips and half as many domestic); and it looks new but Carry-on bags don't get the abuse that checked bags do. I think I paid $140 for it (a lot for a basic Economy Light guy)
Packing Scenario" Carry-on (5.8lbs) + Stuff (11.9lbs) = 17.7lbs / Personal Item (1lb) + Stuff (8.1lbs) = 9.1lbs
Good:
At 21 x 14 x 9 a legal carry on for every major european and US carrier.
It is almost perfectly rectangular so there is no wasted packing space due to the tapered design many bags have.
The wheels are compact and set up a tiny bit into the bag, again making the storage area larger while keeping the height requirement.
Clam shell design so i dont have to tear everything out of the bag to get the stuff at the bottom.
I can hang my "Personal Item" (a small backpack) over the handle and it doesn't fall over.
The ease of maneuvering spinner bags especially on planes.
Clean smooth sides that slide easily into and out of full airline overhead compartments
Downside:
Light for a hard shell spinner but still 5.8 lbs
I always pack to the limit of 17.7kg no matter which bag I use, so the starting weight of the bag doesn't make it "heavier" but does limit the amount that I can put in it.
Admittedly this bag only works for me if I use the Personal Item properly to carry the heavy items and only put fabric in the carry-on; then it works perfect.