I'll say FFV. It has the only ending whose events can be altered by actions taken in the game besides FFIX (and to a much larger degree than that). It also has probably the best ending music in the series, from "The Silend Beyond" to "Final Fantasy" (you know, "Prologue") to "The New Origin." It's just great when that last one gets to its most triumphant part just as we're shown the four heroes, one after another, fighting an enemy and going into a close-up and freezing while a list of their level and the abilities they've learned scrolls by.

The only down note on it is the staff roll sequence; Batz, Reina, and Faris trek across an endless frontier on chocoboback while Klulu rides above on the flying dragon. The graphics are nice, complete with sprites that face diagonally and chocobos that set the precedent for the ones seen in-game in FFVI, but it's terribly bland, just like the "let's look at the Falcon flying from different angles for five minutes" sequence from FFVI's staff roll. I can definitely appreciate that FFVIII and FFIX were the only ones to find ways to make this part of the ending interesting--either by amusing camcorder footage of endearing character interaction (which ironically was missing from most of the rest of the game) or by sentimental reruns of FMVs, respectively.