Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, don’t be afraid to mix and match different paths to tailor your characters to your playstyle. Focus on unlocking key abilities early on, like Quick Hit for Tidus or Doublecast for Lulu. For side quests, make sure to complete the monster arena challenges for valuable rewards and tackle the optional aeons like Yojimbo and Anima. Experiment with different character builds by branching out to different sections of the sphere grid to make your party versatile in battles. Happy exploring!