How to be a Real Nice Guy (and Nice Person):

Personally, I'd say to follow the Nine Noble Virtues or some varation...

but this person (link from rainbowk) has their own ideas.... so here I'm going to write my own thoughts.
I will start by saying that "political correctness" is one of the most insulting and rude cultural concepts I've ever encountered. So yes, before I even start commenting I'm stating my bias.

( long response and partial rant )

There are no "rights" beyond those we earn
There is no free lunch.
And give respect if you wish to receive it.