Originally Posted by SaiKaiTai

I'll argue the "addiction" comment. Being more of an etymological tradtionalist, I find the way this term is tossed about to be a little off-putting. Now, with that out of the way.

I like cycling because it lets me be alone with my thoughts for as long as I care to stay out.
I like cycling because it lets me go anywhere I want to go that my own abilities can take me.
I like cycling because I can always get better at it just by doing it.

It's just pretty darned satisfying