It's like choosing your favorite kid. What do I enjoy listening to more? Stairway, but only by a hair. Bohemian Rhapsody is a completely different animal in all the right ways, though, and is one of the best songs ever made imo. I just love Stairway that much. It's one of those songs that, when I hear it, takes me back to the first time I heard it as a kid. Same night I heard Hotel California, too. Bohemian Rhapsody actually took me a couple years to click with and understand what the hell I was listening to, and I didn't like it at all until that point; I was maybe 11 or 12.
An aside: I was just playing both at the piano yesterday, though, and by the sheets that I have (two versions of BR, one for Stairway), Bohemian Rhapsody is much more fun to play.