Rihanna's a funny one. She undoubtedly has some of the best songs of the last few years and I like them when I hear them on the radio but I have no desire whatsoever to buy a Rihanna album or actively choose to listen to one of her songs. There's something missing for me too in a way that there isn't with Nicki Minaj for example who has quickly established herself as my favourite pop star this year (I'm only using Nicki as an example because Beautiful Sinner sounds like the greatest Rihanna song that never was).
Rihanna looks great and has great songs but overall she leaves me cold. I really like We Found Love and Only Girl In The World but have never once played them through choice. All very odd!