What's your favourite instrument, and what music shows it at its best?

[VoteJadot]

I love a bit of oboe. It can be so soulful, but also really cheerful, as in this gorgeous work by Handel. And I love the soloist's whale jumper, so that's a bonus :-)

Piano. Beethoven Sonatas played by Alfred Brendel, or some Chopin or Debussy.
I also adore the trumpet.

Violin, and Bach's Chaconne in D Minor.

links please ladies!

Guitar... proper classical guitar played like this:

that's beautiful StillMedusa.

Bach cello suite no 1.