Fight Club is one of my favorites movies, I have played it for friends before and they say "it's just a bunch of guys fighting and a shirtless Brad Pitt" and then fall asleep... Painful.

Sometimes I start talking and I see people just lose interest and I think I most be pretty boring to them and I do the same thing as you do, I wait to see how long they notice I stopped talking, sometimes they don't even notice. With time I started to act the same to then, I just lose interest to their boring "normal" conversation, if it isn't interesting or new my brain enterns into hibernation mode (pretty usefull for political and religious fanatics).

I like the "stream of consciousness" thing, sounds much better than rambling, it even sounds deeper, I'll start using it.