1: When I discover that Black magic could take out everything at once.
2: Being able to level up a weapon's skill by using it.
3: (SPOILER)The four old guys who thought they were the chosen four.
4: Mysidia and anything connected (SPOILER)(Palom, Porom, Lunar Whale, Paladin quest, getting a spell casted on you for talking to someone at the wrong time, and the upbeat tune)
5: The real life solution: (SPOILER)You can get rid of anything if you throw enough money at it.
6: Terra. My favorite heroine of the series, comparable to Samus Aran of Metroid. And the Esper system. Once a spell is learned, it is kept even if the Esper is removed. And well, everything else too.
7: Cloud's various dates.
8: LOL
9: Finally getting a chance to fight those runts Zorn and Thorn.