It seems strange to me that many here opt for rectangular watches, but in the end, everyone around wears a round watch...
on the whole, I see this choice exclusively dependent on personal taste and style. So, it's not exactly correct to say that one is better than the other. Both are good from different perspectives. Maximum what we can do here is to share with which type we resonate more, but without criticizing that one is better than the other.
On the whole, the round ones have a more classic and timeless look. After all, these were the first models that appeared in horology. So, rectangular cases are about the evolution of watches over time. that is, they are more about novelty and progress. THIS IS A FACT. So, for a more traditional look, the round ones will suit you better.
The square/rectangular ones are more about modernism as they are sleeker. These are more suitable for making a fashion statement, even if many of them also keep a classic style. but, don't forget about the complications. the most difficult and intricate complications are included in the round ones, which again brings round watches closer to classic and traditional. SO, THE MODERN AIR OF RECTANGULAR WATCHES IS A FACT
Another aspect to mention is the wrist shape. if you put a square watch on a slim wrist, it will look horrible. It looks better on a wider wrist. Conversely, the round one looks much better on a slimmer wrist and complements it better. You can endlessly love square watches... but what's the use if you have a slim wrist and you have to wear a round one?! So, WRIST COMPATIBILITY AND WATCH SHAPE IS A FACT
So, it's not just about shape, but also about many other background aspects = that determine the choice between round and rectangular. everyone chooses according to their own style and convenience. I'm closer to round ones