New iPad User

Hey everyone, I just picked up a new 16gb iPad mini w/Retina Display yesterday. I've owned iPhones, iPads, and iPod Touches, but the last time I actually owned one was back around 2009 or's been a while.

So help me out - what are some must have apps? I've already installed the usual social network apps (FB, Twitter, Google+, LinkedIn), Google apps, Feedly, multimedia apps (Netflix, YouTube, HBO Go) and a bunch of other apps.

I'm still getting used to it, but so far, this isn't a very different experience from a $200 Nexus 7 tablet. What else is out there (games, news apps, etc) that I can use that will really differentiate the iPad from Android tablets like the Nexus 7? What are the real must have apps that show the power of the iPad vs. the Nexus 7?