The E major is the longest on most recordings unless the performer really takes his or her time with the centre section of the B minor scherzo; I shy away from these recordings since this usually means either the E major sounds rushed or the centre section of the B minor sounds boring (the first time I ever heard the B minor performed I kept staring at my watch during the centre section; I appreciate it more now but it's still easy to make the centre section, and indeed the entire scherzo, sound dull because of its degree of repetition). Anyway, my favourite is the E major, which I think doesn't receive nearly the attention it deserves; the buildup to the return of the five-note theme from the opening bars is one of my favourite moments in all of Chopin, but I love the whole piece from beginning to end (especially the coda). In fact, my preference list runs in reverse order of composition (I don't dislike any of them but feel the repetition of the B minor drags it down a bit).