My standard ring is the "Coach's Corner" theme song. (For those of you who have not been lucky enough to watch hockey on CBC-TV, "Coach's Corner" is a between periods segment hosted by former Boston Bruins coach Don Cherry)
When co-workers call me, it's the song that plays on Kilimanjaro Safaris
And, when my GF calls me, it's "You'll be in my heart" from the Tarzan soundtrack.