Speaking as someone who has lived here for nearly 14 years...
Snow/Ice:
Rear-wheel drive cars with nearly 400lbs of torque just don't not fair well. Although it does not snow here often, when it does, the roads are generally a mess. If you must drive, then take your time. Watch the hills and the turns. Also make sure to have a nice coat of wax on to help cover the finish from the salt/sand/road spray muck. VERY TRUE
Radar detectors:
Just don't have it on. Or in the car. The state police have radar detector detectors. I know from experience. AN OLD WIVE'S TALE.
Speeding:
Fairfax county has some very tough laws (and fines) for people caught speeding. GENERALLY TRUE THROUGHOUT THE STATE.
Tint/exhaust/front plate:
I believe Texas is a front-plate state, so you shouldn't have an issue. But the police do pull people over specifically for not having a front plate, having illegal tinted windows, and having a custom and/or louder than OEM exhaust. (
Virginia). AS TO FRONT PLATE AND OBVIOUSLY OVER-DARK TINTED WINDOWS, TRUE. AS FOR EXHAUST, THE RULE IS THAT IT HAS TO BE COMPARABLE TO THAT WHICH CAME ON THE CAR AS STANDARD EQUIPMENT. GIVEN THAT THE E39 M5 CAME WITH QUAD PIPES FROM THE FACTORY, MOST AFTERMARKET EXHAUSTS SATISFY THIS STANDARD. I HAVE HAD TO MAKE THIS ARGUMENT BEFORE AND WON IT ON THE SPOT. STRAIGHT PIPES/MUFFLER DELETES CLEARLY DO NOT SATISFY THE STANDARD.
No washbays:
I think I could come up with about two self-washbays in the entire area. If you like to keep the beast clean and would rather stick a rusty pin in your eye than go to regular carwash place, be prepared to find alternatives if you enjoy going to the self-washbays. VERY TRUE. I KNOW OF ONLY TWO IN RICHMOND.
GUNS!:
It's on open carry state! Oh boy... we'll bust your *ss for no front plate, but it's ok to strap your gat at the mall... NO EXPERIENCE HERE!
Also, FYI, the local NCC chapter is fairly robust and active. Check them out.