Chopin - Étude Op. 10, No. 12
Like the Bach Prelude I wanted to give myself a few hours of solid practice and see how well I could stumble through Chopin's mildly famous Revolutionary Étude. Probably one of my favorite pieces, and definitely one of my favorites to play. It's basically the only piece in my repertoire that I play semi-consistently, i.e. it's the one I trot out to impress people.
Which is basically the greatest compliment a human being could ever receive.
My most egregious errors were a sloppy left hand in the G♯ minor section, and just absolutely wailing that low F instead of the low E. You can tell when it happens cuz I break out the stank face.