I love that my commutes at among the highlights of my day, and not something to dread.
I love that I get exercise just by going to work.
I love making it to work in just over half an hour, when metro used to take me an hour door to door.
I love that even budgeting myself money for bike commuting items and equipment, my commute is cheaper than it would be otherwise.
I love seeing the sun set on the Potomac as I ride home.

There are others, but I gotta stop somewhere. :-)