My answer could change daily - even hourly! So here goes for 11:45pm 3rd Dec 2011, anyway:
IGY - Donald Fagen. Always makes me smile.
Spain - Chick Corea. Cannot keep still.
Haitian Divorce - Steely Dan. Fagen's vocal does it for me.
Bluesology - Monty Alexander Trio. The groove is so good it makes me laugh.
Every Tear is a Waterfall - Coldplay. Wow!
Brand New Day - Sting. First dance at our wedding. Big smile.
Human - Killers. The sound of it makes me smile.
Every Little Thing She Does Is Magic - The Police. Ha!
Let's Dance - David Bowie. Every time..
Le Freak - Chic. As a bassist, the groove hits the spot.
I'll stop there - I'm boring myself, let alone you lot!