I was just thinking the same thing seeing the 8, 8.5, & 9" widths. Aggressive to me is like 9.5"+
FWIW I'm about 1/2" away from max low w/ my ST coils and after some hard driving up the mountains last month I didn't rub once (18x9.5 et40 square). I've even been considering going lower and seeing how much I can get away with before I start rubbing.
Even if it's not wide, aggressive fitment can be two things:
Function - Wide wheels and tires for the purpose of grip for track days or drag strip
Form - Low ride height and lower offsets for visual effect
They can definitely cross paths, but I think the spirit of this thread was for slammed or bagged cars, tucked and stretched, etc. Not being a hater, because good info has been exchanged here, this just might not be the most appropriate thread for more common fitment questions.
You should post your whole specs for reference: Wheel specs, suspension, FTG measurement, Camber specs, fender work, whatever you've got! I'd bet your tire size and alignment play a big part in your car not rubbing, plus stiffer springs. Your car looks great, and if it works well for a car that gets driven and not just parked, that's good info to have if people want your look.