I'm a minimalist and try to travel as light as I can. It saves me both money (by not paying for check-in luggage with low budget airlines) and time (check-in and check-out) at the airport.
My go-to is my "2 in 1" system. I carry Osprey Transporter 65L duffel bag (it's pricey at £120 RPP but I got it for £75) which is nearly "bulletproof" with a smaller Osprey 34L rucksack (great to carry laptop and groceries) inside and some compression drysacks.
Why a duffel instead of a wheelie? Well, it's heavier on my back but I rarely need to carry it for more than 10 minutes, end point to end point - after all I'm not hiking in the wilderness and it isn't designed for that purpose. The upside is that with one key, big and tough zipper, few plastic elements, and just one big compartment as well as high water resistance, there's little chance anything can break and render is purposeless (as if when a wheel breaks in a wheelie rendering it nearly useless). The other key element is increased mobility when going up and down stairs and when it requires fast maneouvers such as running to catch means of transport. Another plus, though not as relevant is it is collapsable and when empty, I can pack it into my rucksack.
Some clothes I have are merino wool and down jacket(s), hence can be worn up to a week without washing, meaning I can minimise the volume in my duffel. I still can pack gym clothes into that and a grid rolller. I don't carry books, just Kindle to read, other electronics are lightweight too, macbook pro 13", small powerbank.
I've never done it, but I could travel with that system around the world easily, and replace worn & torn things as needed - after all, almost everywhere bar Antarctica and Sahara has H&M and Zara
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Adventures in Game updates on the go:
twits by Max Detrick
Unbowed. Unbent. Unbroken.
I don’t ever give up. I mean, I’d have to be dead or completely incapacitated.
-- Elon Musk