Backpack
Machine translation. I wrote this post in Russian and did not write the English text myself. Read the original
Bags are almost always inconvenient, and even when they are convenient they never fit enough stuff, so I prefer backpacks. Backpacks have just one downside: a slightly awkward design or the wrong outfit, and suddenly you look like a schoolkid.

For myself, I found the perfect option: the National Geographic NG A5250 bag/backpack. It is as stylish as a bag and as practical as a backpack.
Cons:
- after 4-5 months, some paint wore off the zipper pulls
- the straps are not especially ergonomic when worn as a backpack
- without a laptop inside, it does not hold its shape well
Pros:
- build quality and materials
- despite its compact size, it is quite spacious
- convenient backpack-to-bag transformation