Hey fellow Final Fantasy X explorer! When progressing through the sphere grid, focus on unlocking key abilities and stat boosts for each character first before branching out to other areas. Don’t be afraid to backtrack to grab important nodes you might have missed.

For side quests, make sure to complete the Monster Arena challenges for valuable rewards and the Celestial Weapons quest to unlock ultimate weapons. Don’t forget about the optional Aeons and Dark Aeons for extra challenges and rewards.

When it comes to character builds, consider each character’s strengths and roles in battle. Customize their paths on the sphere grid to enhance their abilities – like focusing on magic for Lulu, strength for Tidus, and agility for Wakka. Experiment with different strategies to find what works best for your playstyle. Happy exploring!