I'm still learning :) In the 80's I did some completely illegal dirt bike riding, and a for some recent years I commuted to work on a 50 cc Aprilia Scarabe. Only this fall I've started the process to actually get a drivers license, and so far I've taken lessons on an airfield basically learning how to do emergency braking, countersteering, swiveling and other necessities - all this on a Honda Hornet with more effect than my little Toyota cage :)
Hope to soon get my learning permit which allows me to train in traffic as well, but as I have sleep apnea I had to see a doctor first, and the bureaucracy takes some time. I might still be able to get my license this season if it doesn't take too long.
IMO the training on the airfield riding around the cones and such is quite useful - I really hate the extremely slow driving I have to learn as well though ...