I'm getting better at observing speed limits; in my 20's my right foot had only two positions, full on the gas or off. Luckily my reduced budget meant the only cars I could afford had a 0-60 time of eventually. In my 30's pretty much the same, but with bigger engines and a better brakes. Now in my 40's and with a kid, I'm right on the limit in school zones (20mph in the US), ok'ish around town as I go with the flow. Yet the flow in general always speeds unless a police car is in view, for example often 40-45 in a 35mph zone. On the motorways or highways, as fast as I can get away with which is usually about 85-90mph, but I'll nudge +100 every now and then just for old times sake.