I hear you on the ex-jock, weird nerd, cookie-cutter suburban stereotype thing. I see it all the time simply based on where I live and work.
I also see another version of the entitlement attitude, though. People on welfare are (generally) bastards about it. If something goes wrong with their coverage, LOOK THE FUCK OUT!
Now, I can appreciate those families who have kids with severe disabilities. The medical bills must be outrageous. What I don't like is when I am effectively paying for the Ritalin of some bitch's shithead inbred kids or for some junkie's Rx drug habit. Half of them don't even say "thank you" and God help you if they have to wait...
I'm done now.