Music Of The Sun and Loud. The former is a filler-packed album with a few bops in between, while the latter is an overrated album full of generic songs that become dull after too many listens.
Unapologetic > Rated R > Good Girl Gone Bad >> Talk That Talk >> A Girl Like Me >>> Loud >>>> Music Of The Sun
Unapologetic really flopped for me (I couldn't stop listening to Talk that Talk and Loud but I barely listened to most of UPG), so I'll go with that one even though it has some flawless tracks.