I used to do a lot of biking when I lived in Germany and in Washington state. Here in NC, the greenways aren't very long and there's no way I'm biking the roads with you horrible drivers out there. I'll still ride around my neighborhood on occasion, but that's more of a recreational thing with my oldest son.
Right now, I'm concentrating on running. My cardio is decent overall, but pounding the pavement still gives breaks me off.