Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

Kanye West - Power (Saints Row 3) Main Tune
MGS Codec as text
Many more but too long to list.
 
Mine is All Your Reasons by Matchbox Twenty but I had it as Standing on the Mountain Top by DJ Khaled for a long time. The text and email tones are just the default.
 
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A406 Safari/7534.48.3)

My new Tone is a police siren, the look on people's faces when I'm on the bus is funny, all the fake gangsters **** themselves
 
Custom ringtones

I have two phones
Work one uses Rocky mountain Way by Joe Walsh
private one uses Sunshine of Your Love by Cream
On the work one my boss has a custom ringtone Working for the Man by Roy Orbison
On the private one my wife is Sitting here loving you by the loving spoonfull
My daughter A little ray of Sunshine by Axiom
Oldest son Bad Boy for Love by Rose Tatoo
And the yongest son Pump it by the Black Eyed Peas
My wife uses Light my Fire by the Doors
 
♫♪♫ Zoom, Zoom, Zoom - yeah, zoom, zoom, zoom, zoom. ♫♪♫

scaled.php
 
Standard phone calls (people not in address book) is the CTU ring from 24
Fiance: Basshunter - All I ever Wanted
Mom: Top Gear theme

I have more for friends/family but can;t think off the top of my head.
 
Several that I use depending on mood:

My Head's in Mississippi - ZZ Top
Our Man Flint President's phone
The alarm music from Kill Bill (used when Vivica Fox sees Uma Thurman at her door)
Chameleon - Maynard Ferguson (the opening blast from the horns is pretty jarring)
Sir Robin song - Monty Python and the Holy Grail
Don't Answer the Phone, Man - Cheech and Chong
 
Mine is "The William Tell Overture" by Voice Trek, every time my phone rang people around me will smile. :)
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.