Motorcycles! always good stuff
1) Right now I just have on the one back, a 2011 R6 race bike. I used to ride on the street when I was living in San Francisco, but haven't had the resources to snag a bike for street duty.
2) Tracks only at the moment! Thunderhill, Sonoma, Buttonwillow, High Plains, Chuckwalla etc. Highway 1 if I can get a ride on a street bike here and there, but my canyon riding aggressiveness has gone down a lot since racing
3) bought my first bike was I was 19, a '99 Ducati monster 750. Sounds like a beast but it's a great first bike. Simple, relatively light and it only had 65 hp. However we used to race dirt bikes (had a Yz125) so already had a familiarity with riding some
4) Be incredibly aware of your surroundings when you ride. Don't bother riding with music for awhile because it's cool, ride like everyone is going to hit you, or can at any moment, because they might. You have to be actively vigilant, don't put yourself in blind spots, don't cross lanes, don't blast through intersections where someone could make a left turn etc, you need to always be prepared, and it'll eventually become habit. Can't slack off on a bike if you want to stay safe.