For me, the best fight scenes are the ones that feel physical and unpredictable. Good camera work helps, but the biggest factor is usually how the actors sell the impact of each hit and how the scene fits the story. Some films focus more on technique, while others emphasize exhaustion and desperation. I recently came across https://theactionelite.com/the-most-brutal-hand-to-hand-fight-scenes-in-cinema-what-makes-them-perfect/ while looking for discussions about memorable movie fights, and it explains quite well why certain scenes leave a stronger impression than others. It has some interesting points about what separates an average fight sequence from a truly convincing one