Hey fellow Final Fantasy X enthusiast! When it comes to side quests, there are a few must-do ones that can greatly enhance your gameplay experience. Don’t miss out on the Monster Arena, where you can battle powerful foes and unlock rare items. The Celestial Weapons quest is also crucial for maximizing your party’s potential. And of course, tackling the various optional Aeons like Yojimbo and Anima can give you an edge in tough battles. Remember to explore every nook and cranny for hidden treasures and NPCs with side quests to offer! Happy adventuring!