You know what I may miss most from Final Fantasy games. (other then story and character development.)
Airships. Before Chocobo's Airships were THE defining characteristic of Final Fantasy games. Not the Star Wars Episode 1 type Airships of 12... but the ones that were basically naval ships with propellers.
There was just something so ridiculious looking about the Airship as it first rose up from the sands in FF1... but it became so common place and normal after a while. (aside from Big Whale.)