I have a different way of playing too. I dont tend to get distracted once a game starts ... only in between games. I procrastinate after beating one and starting the next, but once that next one starts, I become obsessed with finishing it.
We're very much the same in that, then (I also prefer to throw myself entirely into whatever game I'm playing until I've finished it, fucking around for a bit, and then repeating the cycle all over again as soon as I start the next game:)
This actually kinda ties in nicely w/ me being a "completionist", too
I wouldn't even try to remember back to make a list of games I played long ago, but, I do think it would be cool to see how much progress I've made/need to make with what I currently own...