I have only ever been pulled over once in my STi, and it was at 2 a.m. for a dui check, no ticket no warning just a compliment.
I have been pulled over twice in the GTO and got harrassed both times about the tint that was on the tail lights. I didn't recieve a ticket there, just two lectures about 5 minutes apart (but this was cobb county so i wasn't exactly in disbelief)
It's all about your demeanor and attitude. You will be treated the way you portray yourself. I always make sure to keep my hands visible and lose all hints of sarcasm, and it has done me well so far. If I act like an idiot though, I expect to be treated like one.