It depends. While a lighter mouse is quicker to reposition, a heavy mouse has advantages when it comes to aiming and counteracting high levels of sensitivity. FPS gamers may want a heavier mouse for more accurate targeting. This is especially important for those who favor a high DPI setting, where less movement of the mouse results in a larger cursor movement across the screen. On the other hand, if fast acceleration and deceleration is the key to your game of choice, a light mouse may work best.
When choosing the ideal mouse weight, gamers should also consider their arm strength, hand size, and portability needs. A light mouse is well-adapted for travel and gaming in small spaces. But gamers with larger hands and stronger arms may struggle to achieve a satisfactory level of control with a lighter mouse. In this case, weight is a matter of personal preference. Modern gaming mice have adjustable settings to let gamers get exactly the right DPI and precision for their purposes, so weight is arguably less important than DPI and other programmable factors.