Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, make sure to focus on key abilities for each character to maximize their potential. Don’t be afraid to mix and match different paths to create unique character builds.

For side quests, be sure to complete the Monster Arena challenges for valuable rewards and the Celestial Weapons quests for powerful weapons. Also, don’t forget to participate in the Blitzball tournaments for fun and unique prizes.

As for character builds, consider specializing each character based on their strengths. For example, Tidus can excel as a physical attacker, Yuna as a white mage, and Lulu as a black mage. Experiment with different abilities and see what works best for your playstyle. Happy exploring!