If all you want to use a tablet for is to consume media (reading ebooks, watching Netflix, playing some games) there's nothing wrong with the Kindle Fire. But, you're locked into the Amazon ecosystem.
With the Nexus 7, you have infinite potential to use the device in any way you please, for any purpose. You can still read your Kindle books on a Nexus 7, you can still download the Amazon appstore, etc. Kindle's interface requires absolutely no learning curve, but if you don't find it to be efficient there's no way to change without rooting. Since the Nexus 7 is straight from Google, you'd be one of the first to receive OS updates.
It really boils down to a matter of preference, but if you're going to use a tablet for anything more than watching movies at home, you should probably get a Nexus 7--you never know what you want to use the device for in the future.
With the Nexus 7, you have infinite potential to use the device in any way you please, for any purpose. You can still read your Kindle books on a Nexus 7, you can still download the Amazon appstore, etc. Kindle's interface requires absolutely no learning curve, but if you don't find it to be efficient there's no way to change without rooting. Since the Nexus 7 is straight from Google, you'd be one of the first to receive OS updates.
It really boils down to a matter of preference, but if you're going to use a tablet for anything more than watching movies at home, you should probably get a Nexus 7--you never know what you want to use the device for in the future.