I tend to agree with most of the points above. I'll add my own, too.
As has been stated above: Do and Don't play race. Please please please don't do the stereotypical race portrayals, or at least make them fresh if you do, put your own spin on it. I had a guy in one game play a dwarven paladin (tortured crusader) of Torag, and he played it rather straight, but put the character's personality first. Brash, gruff, but the way he had the character speak and act made it feel more fresh.
Of my own characters: I have a fetchling wizard from Nidal in my Way of the Wicked campaign - and his race actually influences his actions. Fetchlings are not liked in Nidal and mostly (from my reading of Inner Sea Races) are treated like foreigners - ie, not well. He showed magical aptitude and was taken to the Dusk Hall for training, but was never really accepted, and now has a rather determined chip on his shoulder to prove himself, despite being sent on a suicide-mission to Talingrade to represent Nidal's interests in overthrowing that government.
In the case of my tiefling rogue/swashbuckler, race played a role mostly just in his backstory. He was born in a small town where tieflings were very looked down on and his mother was abusive before dumping him on the steps of a temple of Serenrae. He grew up in that faith, and being told (at least in his mind) that he had to be redeemed based purely on his race. (He ends up going on a bender and finding Cayden Cailaen. He's much happier after that.)
I like using the setting to help me flesh out characters. My fetchling would be a very different character if he'd come from, say, Absalom, where fetchlings are treated much better. He wouldn't have this need to prove himself.
Basically, I guess I'm trying to say that there's more than just race to think about. How does it interact with environment, religion, etc. None of these exist in a void, or separate from each other.
