Unfortunately, we can't provide a straightforward answer to that. What may be the ideal sports watch for one person, may be not enough for another. Everything depends on the sport you practice and the intensity of your activities.
Runners are best suited with a watch that accurately measures data such as distance, speed, heart rate, stride length, and calories. A good GPS function may also be essential. Especially if you frequently venture into the woods or remote trail paths, accurate navigation is indispensable.
For swimmers or triathletes, there are waterproof sports watches that also have specific technology to register swimming techniques.
Also, consider the intensity of your workouts. If you're a recreational athlete who just enjoys stretching the legs, you probably won't need to worry about your VO2-max, lactate threshold, endurance score, or hill score. However, as a competitive athlete, these data points can be valuable.