lane or sidewalk?
I also have done both (heading west to east) I take the lane on light traffic days when I am feeling energetic and fast. But honestly I prefer the sidewalk, it slows me down a bit (a good thing) and on good weather days I can't resist stopping to enjoy the view. And while I like to ride fast for fitness, riding slow enough to enjoy the view can be one of bicyclings greatest enjoyments. I never run into much pedestrian traffic anyway but its good to have a bell to let them know you are approaching.