It happened to me more than once that I didn't finish my game.
When all the cities and forests of the mainland were explored (and in a certain way exploited, hehe) I got into a "oh-no, it's almost over" mood and that lowered my motivation.
Stuffed with all the loot of the City of Sky and the Dragon Mountains I finally stopped...
(well, this game speed bug while playing with Dosbox was responsible the last time)
The fear of losing all my costy weapons during the import to Wiz8 did the rest, so I prefer memorizing my beloved party as high skilled, super equiped...and still sailing the seas of Lost Guardia. They sure live in a nice bamboo village on a remote island beach with all the heros of the former partys.