The first movement is lively-ish with a slightly nostalgic tone to it. The second is more sedate and melodious and the fourth is well, something else altogether. But it's the third movement that is undeniably the centrepiece of this sonata - a slow, sombre yet purposeful piece of magic. Even within this movement, it's the soft interlude sandwiched between the funereal themes that seduces you to a different place altogether and is beyond breathtaking.
I can't quite put it into words. But it's a bit like there are about 4 pronouncedly different personalities within Chopin trying to outdo each other and fighting for your time and attention. Sigh. I hope I never get tired of this piece!