I have manners, but I don't care for a prize...

Think this:

When you open the door to someone, you do it for a "thanks" or for self respect?, actually, if you do it for the thanks, you don't have a lot of manners, just have "gentle" actitude.

But when you do it just because you want to, and don't care about the answer of the others, then you are great

Just be yourself, don't care about the answer of others, with the just feeling of have done a good action, that should be your prize, don't you think?

Godspeed