Disgaea 400 hrs (Made a God)
Pokemon Red +- 300h (Children sure can grind)
Makai Kingdom 230h
Final Fantasy X +-200h (3 Playtroughs)
Phantom Brave 120h
Final Fantasy XII 120h
Naruto Ultimate Ninja Storm 2 80h
Mugen Soul 80h
Final Fantasy XIII 70h
In fact I'm impressed on how man,y hours I played on solo games.
Btw the 200 hours I spent on Makai Kingdoms were all played during two weeks, on summer holidays