A quick search fails to find a poll of members' real life racing experience. 

I was just going to make one but I think collectively we could come up with better categories than I could alone.

I'm thinking along the lines of:

Soap box derby
Karting
Midgets
Sprint
Stock car
Touring car
Motocross
Pocketbike
Production Bike
MotoGP
Autocross
Rally
Ice
Lawnmower
Drag
Race what ya brung
Drifting
Various open wheel I'm too ignorant to break down at this point

And the ever popular:
"But officer those curves have a great rhythm at 100 Kph"

There are flaws in this in that vehicle type, format and level of competition are of interest.

I'm not sure how wide a net to cast and how to boil this down into workable categories.  I welcome your assistance. 

Vincentz
(who once got only a verbal warning for speeding transporting his obviously visible kart to Saturday practice.  The officer did not say, "If you want to speed, take it to the race track" as that was literally what I was doing.)