I could never play piano - it's not the two hand thing that gets me, it's the reading both bass and treble clef at the same time. I play classical guitar and tenor recorder, so I don't normally read bass. I had to learn it recently for my first ever theory exam, though.
As for dancing, ballet is really technical. Sadly, it can also get quite exclusive. A lot of ballet schools have this attitude where, if you don't want to be a ballerina, you shouldn't be doing ballet. I did ballet because I love the grace of it and its amazing exercise, but because of that attitude I ended up moving schools and switching to jazz and tap. No pressure to go en pointe here, which is good because my point is terrible and I cramp up like crazy.
I can't sing, but I'm an ok actor. When it comes to drama, though, my passion is script-writing. :) I'm hoping to co-write a Dracula screenplay with my best friend over the summer holidays.