I completed DQ IV in about 40 hrs. I'm 24hrs in DQ V right now. I'm not a 100% type of person so I just played the game until the end credits rolled.
360 Games Now Playing: 360 Games unopened: Resonance of Fate Last 360 Game I Beat: Resident Evil 5
DS Games Now Playing: Dragon Quest VI DS Games unopened: Knights in the Nightmare, Etrian Odyssey III, Okamiden, Dragon Quest IX Last DS Game I beat: Radiant Historia
Wii Games Now Playing: Super Mario Galaxy 2, Arc Rise Fantasia Wii Games unopened Little King's Story, Sonic Colors, Silent Hill Shattered Memories Last Wii Game I beat: Sin & Punishment 2