This describes me to a T.
However, it's not a result of sobriety and I've pretty much been like this since '98'.
Before that, I was always out tearin it up.
Then in '98' I got interested in 3D design and started doing freelance work.
Even if I wanted to go out, there's nothing around here but the bar scene.
My area breeds addicts because there's never been anything to do but get intoxicated.
So generations pass the addict gene down, and there's still nothing to do so people start drinkin and druggin in high school and next thing you know you're 30 and always at the bar.
The introvert/extrovert concept is always at work.
Some people thrive on external stimuli, some people thrive on solitude.
I'm an introvert through and through.
I live in my head, and constantly seek creative output.