[Sirtel]

Basically what it says on the tin.

As for myself, I was a Kindle user for many years (2011-2018 I used only Kindles). Sonys were too expensive for me then and Kobos had no physical buttons until late 2018; so it was Kindles. I was never much invested in the Kindle ecosystem, though. I did buy ebooks from Amazon, but also from many other stores, and I was a heavy Calibre user since my early ereading days. I never used Whispersync much, even when I had several Kindles. I preferred to sideload my books from Calibre.

In 2019 I tried a Nook and a Kobo. The Nook was a nice device, but I never grew used to the software - too slow and too few customization options for my liking. At first I was not wildly enthusiastic about the Kobo either, but I warmed to it more and more over the next couple of years; in 2022 I sold my last Kindle, the Oasis 3. From then on Kobo has been my favorite brand. I like how much you can customize your Kobos and how they integrate with Calibre. Of course Kobo has its faults - their devices tend to be buggier than Kindles, for example (not that it's necessarily always the case; my first Kobo, the Libra H2O, had no bugs, but my later Kobos have occasionally had some. Nothing too bothersome, though).

I may try another brand again in the future; I don't consider myself quite married to Kobo yet. So who knows, I may find another favorite someday.