IMO although driving definitely plays a part (if you come around a corner sideways, you are obviously gonna get pulled over), I dont think that is the main factor.
In my situation, my car looks standard from the outside besides the rims and exhaust (no tint even), and I drive even slower on the streets than when im in the daily, but yet I have been pulled over a ridiculous amount of times, im guessing coz of my record of license suspensions (which wasnt from driving dangerously or the like, eg. P plates not displayed, going through an amber light only to be pulled over for 'jumping a red light', etc.).
Perhaps living 100m away from a popo station doesnt help my cause either. I have put a lot of thought into this and I was thinking maybe i drive too slow, therefore looking suspicious? Haha, I can only hope things get better when I get my fulls not long from now
This obviously doesnt apply to you so I wouldn't be worried if I were you