Xenogears 85 hours invested.

FFXII 125 hours, but I still have a two mark hunts (Yiazimet being one of them) and the Hell Wyrm and Omega Mark XII battles, as well as ultimate weapon collecting so it will probably be longer...

Disgaea about 125 hours as well. I want to fight Prinny Baal

Dragon Quest VII being clocked in at 144 hours when I finally finished it. I still have the two optional dungeons to go through though...