Same here. 30 kph is sacred because it's almost exclusively at schools and daycare centers. I also keep to 50 within towns. Other then that, as fast as I feel alright with. But mostly ten or so over
As for fast I've driven...190 kph in my Saab 9-5 I used to have. The stupidest thing I've done is trying to catch up to another vehicle with quite an headstart on a 1-2 highway (something probably unknown to Americans, it's a highway that alternates between 1 and two lane, with wires as a border in the middle, supposedly it's safer

) in
heavy rain, going at about 180 kph. In hindsight that shit could have gone really, really,
really bad.
And yes, we caught up with the other vehicle.