"Playing volleyball is my favorite exercise."

Translation: 打排球是我最喜欢的运动。

[freymuth]

Is 的 after 我 incorrect?

[Cinnamon5230]

最喜欢的 = favorite (literally "that I like most"). 的 indicates that it's used as an adjective.

[jcreed]

but could you also say 我的最喜欢的运动 instead of 我最喜欢的运动?

[SPX656767]

Can we use 最爱 instead of 最喜欢? It marked it as incorrect.