legal tint here is 35%. with that being said, we have one of the highest crime rates in the country, therefore, i have never been pulled over for tint and i dont know anyone who has.
on my GT, i had 15% all the way around and it was perfect. just dark enough. 20% seems a touch too light for me.
but on the same note, my gtp has 35% i believe, and it's OKAY for me. i would prefer it darker, but i get anxious and tremble at the thoughts of someone pouncing around in my car's interior to re-do the tint. so yeah
point is... if you want a mid point perhaps 20 is your winner.