Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, focus on unlocking key abilities first, like Quick Hit for Tidus or Holy for Yuna. Don’t be afraid to mix and match different paths to maximize each character’s potential.

For side quests, make sure to complete the Monster Arena challenges for some sweet rewards and tough battles. Also, don’t miss out on the Celestial Weapons quests for ultimate weapons for your party members.

As for character builds, consider customizing each character to specialize in a specific role, like physical damage dealer, magic user, or support. Experiment with different abilities and see what works best for your playstyle. Happy exploring!