Yeah that sounds like me also. Another thing I have always been like is doing stuff that I found funny that could get me into trouble. At the time, I never think of the consequences. I also get uncontrollable laughing which I cannot seem to control at stuff that isn't all that funny.

I am the same, I get rages and in the car this is not good. also flipping the finger. Like recently I chased down a car when a guy overtook me and yelled at me while his girlfriend drove. So I chased them and pulled them over. Now these two were as rough as guts, that is just not something I would normally do. I was all ready for a full on confrontation. It was luckily settled and did not come to that, but honestly one moment I'm passive and wont do anything, or I go the other way.

It does not feel like I am me sometimes. So yeah all these traits could easily be applied to myself and for most of my life. But mainly I'm withdrawn, antisocial, afraid of going anywhere and I just tend to stay in my room. No motivation or much feeling.