Good question. I would say that 30-35% looks great. I agree that the really dark tints look cheap. I would say to try to keep it legal with like a 35% tint (at least in my state that is legal). I need to get my windows retinted. My driver's side window as a bad scuff mark on it, so I'll have to replace that whole window. Also, I'll have to remove the tint from all the other windows. Anyone know how much a 92 GSR driver's side window is gonna cost me???