I have music of my own composition for important contacts, but for one contact I use Jack Torse sound bytes like "hurry up" and "I'm only scarred about the face and breast, chest, neck and head"... for a friend who's really sensitive about his age I use "I've fallen and I can't get up"... of course he never is in proximity to my phone when he calls, so he doesn't hear that.
Main ring tone is the Eagles' "Life in the Fast Lane". When my wife calls, it is "Cherry, Cherry" by Neil Diamond. When my Daughter calls it is "Grace Girl" (her first child and our first grandchild's name). When my son the psychologist calls, it is "Intro to Philosophy". And when my son who directs the Story Wranglers and is Outreach/education director at Paramount Theater in Austin, TX calls, it is "Best Imitation of Myself ". All those are by Ben Folds.
If it's a client calling me, it's Money by Pink Floyd. If it's my business partner, it's the beginning of the theme to the Sopranos. If it's my wife, it's Right Down the Line by Gerry Raferty. If it's someone who is not in my address book, it's Who Can It Be Now by Men at Work. If it's my mother-in-law, it's Crazy by Gnarls Barkley.