Does anyone else think he's the best character in the game?
I certainly do.
I especially love how nuanced the conversations he has on the endings are. In my Institute ending, no surprise he was horrified by the fact they won, but I actually got to point out the fact the Brotherhood of Steel would have been worse. Even then, Nick's reaction is exactly the one *I* had to the Institute/Railroad's plan.
"Was it necessary to kill ALL of them?"
That was unexpected and well done.
It seems even Nick is aware the game is fond of overkill.