My personal line is the first 30 seconds of Plug In Baby by Muse. No one else has that as a ring tone. My business line is the start of Dakota by the Phonics.
My text message alert/email notification etc is just a click, except when my mate texts me and my phone blurts out "It's so FLUFFY" from Despicable Me. It's a private joke but always makes me (and those around me) chuckle. I used to have LOUD NOISES from Anchorman but got into trouble in the office everytime it went off.
My favourite ring tone was way back in the day when I had the theme music to Cannon Fodder as my ring tone...I'm such a geek. LOL.