Just for fun, describe any intrusion of your 'geeky rpg hobby' into your daily life, particularly if it has to do with Planescape. Anyone that posts on this board is bound to have at least a few stories to tell. I know I do.
Have you ever started talking to somebody in cant? Do your decisions depend on how closely they follow the Rule of Threes, Unity of Rings, and Center of All? Have you ever found yourself mentally calculating your boss's stats to see how likely you are to sneak past him? Do you try to feel the Cadence of the Planes? Do you swear that the old lady living down the street is a Night Hag in disguise?
I know that I've personally caught myself slipping into cant on at least a few occasions, and my personal philosophy has been influenced to some degree by the ideas presented in Planescape. Sure, it's a fantasy game, but that doesn't mean it doesn't have something interesting to contemplate.
This has more to do with BG2 than Planescape.
Once, when I was driving down the road in an area I was unfamiliar with, I realized I had two choices--go this way or go that way. I had no way of knowing which was the right way.
The first thing that came to mind as I made my choice was "Better Quick-save first."
True story.