Going nearly 4 years without playing it. Trust me, that's an achievement.

In-game:
Filling my stables with Rank S Gold Chocobos, dashing past Zolom without a Chocobo (skipping the farm altogether), Obtaining Leviathan, Typoon, KotR, Omnislash and W-Summon, Aeris' Parasol and Cid's Flayer, Mastering E.Skill, Having Sex with Aeris and Tifa, Recruiting Reno and Rude, and performing Omnislash V6

Obviously those last three are jokes. Obtaining that Parasol AND Flayer was definitely tedious. As I recall, you had to get over 5000 points for each. But as the points don't reset, it becomes insanely difficult to win the Flayer after obtaining the Parasol if you won with too high a score. If you manage to hit everything including the UFO at the end, then only the rotating paddles on the Ferry can alter your score by a multiple of 1.