:dumb::dumb::dumb::dumb:
When you see the Nexus name attached to a phone, it basically means it's Google's flagship phone. It's the way Google wants an Android phone to be. So you get the pure Android experience, no bullshit skins (sense, blur, touchwiz).
It will always get the latest updates. You'll be rocking Jelly Bean while these queers with sense phones are still praying for Gingerbread or ICS. It's the only phone that is made for ICS, so it doesn't have any physical buttons (besides power and volume rocker).
It's practically made to be rooted, really simple, and Google releases the system image so rooting and then going 100% stock takes 2 lines of commands.
It's also one of the VERY few phones that has NFC, and the gold connector pins makes for easy docking (no homo)
Only bad thing I see here is that you'll get the CDMA Nexus. It's fatter, it's not supported by google as the official developer phone, worse battery life than the GSM...but that's splitting hairs