The Air and Variations from Handel's Suite in B flat.
I recorded this a year ago at Northfire Studios in Amherst. Really, this piece has been a favorite of mine since high school. Ebullient joy is one of the many emotions that is far easier to express in music than in words.
Here is the Soundcloud link
(and once again, if the link fails, I'm sure the embedded player at the top right will work.)