Worldwide, not all highways, roads, streets and other public byways have speed limits or enforcement of speed ordinances. If you could,

Nice picture :).
It depends on so much more than just speed.  
If it was a nice day, I would like to drive about 10 miles an hour.  I love to drive with the top down on beautiful days.
If it is raining, I would like to drive without anyone else on the road at about 34 mph.
If I am late, I would like to drive with no one else on the road and no traffic lights at about 85 mph.  On my drive, that is a reasonable speed that still gets you there on time and not losing control. This post was edited by Merlin at May 30, 2019 5:05 AM MDT

I drove 120 mph with a bf in a Corvette once.  It was exhilarating, scary and foolish all at the same time, but tons of fun.  120 mph it is!

Max 60 - and only on straightaways.  This is mountain area ... and it's a long way down.

on the Autobahn
if I had the car that would do the speed
140 mph would be cool for me.
I did 140 MPH once in an Avanti,
and it felt good...hahaha

I like to drive about 10  or 15 mph slower than the other cars on the road. It's what old people do.

For so many years I was always in a hurry and drove like a maniac.  I thank God daily that we survived those years.  Now I generally go four or five miles over.....that's where I'm comfortable. In residential areas I drive slowly.  I have had more that one experience of a kid on a bike dart in front of me.   I'm hardly ever in a hurry anymore.  I love that.