OMG the Barcarolle!!!
The 3rd ballade is very easy, compared to the other 3. BUT, it is a very beautiful, happy piece! the coda section with the skipping triads is kind of fun and silly. I really like the way Cortot makes is sound like someone is whistling in 16th notes. lol
The last 2 pages are such a relief of emotion, where you danced along the whole ballade, kept stretching the tuning up higher near the end, and yet more, some ascending octave chords (dunno what to call them, you know...the 3rd/octave deals?) and you keep accelerating! then, you are finally there, and you keep going up and up...and near the end, you start descending...then you ascend again (i mean pitch)! and then, the really pretty part comes in again, whistling along, and ends the piece by descending, but upbeat. XD
I think it is my favorite Ballade, honestly. It is an amazing piece of music.
The Barcarolle? Tooo friggin difficult.
What about the Scherzos or maybe an impromptu? The first impromptu is really nice and pretty easy. The fantasy in F...is also a large piece, and really difficult, from how it appears to the eye.