Let's see:

Story, Miqo'te/Au Ra girls lol, FF Legacy aspects and how they're integrated, playing/socializing with and/or making new friends, glamour of course, exploration (especially random little things that are lesser seen), raiding, pushing myself to conquer tougher challenges, Moonfire Faire, and humorous macros.

Fave characters: Kan-E Senna, Minfilia (besides the 2 obvious reasons why, I believe she's the sleeper badass of the Scions), Alphinaud (Heavensward has given me a better appreciation of him), Yugiri, Thancred and Y'shtola as of Heavensward, Godbert, THE SKYBEAR (he reminded us all to never stop believing, lol), and believe it or not, Edda.