Aggressive driving also has negative connations, from a police officers POV. I was ticketed in my Monte Carlo for "Agressive Driving/Unsafe Start". Basically, I pulled a U-turn on a four lane divided (US 30 in Valparaiso, IN) which was legal, but I floored it & probably left a good 60' patch. Took the next turn at high speed & chirped the tires again when I mashed the pedal. A cop saw the whole thing, hence the ticket. Also, those people on the highway who are always weaving in & out of traffic are often referred to as aggressive drivers. I really try to stay away from doing that, it can be dangerous. I think everyone on the board is just referring to driving your car hard, ie: high revs & occasional high speeds to break the engine in.