Hey fellow Final Fantasy X explorer! When progressing through the sphere grid, focus on maximizing your character’s strengths. For example, Tidus is great for agility and speed, so prioritize nodes that enhance those stats. Don’t be afraid to branch out to other characters’ sections for useful abilities like Steal or White Magic.

For side quests, definitely prioritize capturing monsters for the Monster Arena. It’s a great way to earn rewards and unlock powerful enemies. Also, don’t forget about the Celestial Weapons quests for ultimate weapons. They require some effort, but the payoff is worth it.

In terms of character builds, experiment with different paths on the sphere grid to create versatile party members. Mix physical attacks with magic abilities to handle different situations. And don’t forget to customize your equipment for added bonuses. Happy exploring!