...the future is Mozart:

Earlier this week, my flute teacher gave me a little shopping list for music, and be still, my heart... Mozart K. 314, the second flute concerto in D major, has been on my flute bucket list since the very early days of flute-mania. Its final movement never fails to cheer me up. It's likely you heard the tune somewhere before, it's very "hummable" and it's hard to believe this piece was originally composed for oboe because it sounds so good on flute.

If you think it's just me who feels it's a joyful piece, check out the full concert with Emmanuel Pahud playing this in 2001 in Istanbul (starting at 25'), who simply dances his way through the whole thing with the Berlin Phil conducted by Mariss Jansons, making it all airy and light and happy.