I carry less keys.
My car goes unloved/unmaintained. (I'm working on that, even if its unused I should still take care of it.)
I fight the urge to use hand turn-signals in crowded grocery stores.
I'm smiling when I arrive @ the office.
I'm becoming my own bike mechanic.
The roommates call me "crazy" more often than normal. (So what if its below freezing in the AM? I don't have to scrape a car window! Who's crazy now?)