When you bike for transportation you can really experience the world a-round you. You get to see things you wouldn't notice [like anything other than the car in front of you!], smell things like flowers, feel the world you are part of...It also allows you to stop easily and take pictures to share with others so they can experience it a little [not the same as be-ing there, of course].
And, of course, riding for transportation means you aren't polluting, saving lots of money, getting/staying in shape and not contributing to wars for oil, the 'tar sands', etc. Enough reasons?
And here's one of the few great images...see here for more: