Tablet optimized apps?

Hey guys

I just got a nexus 10(also own nexus 4) and I've installed about 60 apps which are mostly optimized for tablets ui.

But I want to know some decent Google reader apps or news apps which are optimized for tablets.

And one more question!

If you are using Nexus devices, why are you using it? What's the reasons? (Compared to HTC One or Galaxy s4?)