The speed limit or 5 over at most. Anything else they will get you eventually. State troopers do it by the book so odds of talking your way out of it are much slimmer vs in-town police who may let you off depending on their mood.

As someone who has driven a lot of miles in rental cars it's way easy to speed in newer vehicles as you don't notice the speed since they are so quiet and smooth inside. I've looked down found myself going way over without even realizing I'm doing it, especially on downhills, or in the dark.

These people who do 90 and blow past everyone are just asking for it. Blow a tire or tangle with a semi-truck changing lanes at that speed and your likely to get maimed or killed.