My parting has always been on the left hand side. Last time I went for a cut, the stylist gave me a long, low side fringe and a really deep parting - so far to the left it felt like it was hovering above my left ear...
I didn't get along with the side fringe - it kept flopping in my eyes and blinding me at inconvenient moments so I am growing it out.
My part is on the left side. It used to be straight down the middle (referred to as the "butt cut" by my dad, lol) but I got tired of it and decided to part it down the side instead. I have to say I like it much better.
At first it was middle, when I was a very small kid.
It's been getting further and further to the right since. x3 I'm getting some side bangs cut in a couple of weeks, too, so even more right-parting for me. The last time I cut them myself and I ended up wearing it up with bobby pins for a good while. xDD My hair doesn't grow very fast and I screwed up pretty majorly.