I just got a fancy new phone, so I've got quite a few new ringtones on it. The default ring for folks with Caller ID is 'Summer Lights' from Air, and for those without I have the opening theme to Chrono Trigger. I've got a few fun tones assigned to various friends - the opening to Ny Neighbor Totoro for my girlfriend, and Tori No Uta from Air, Vampire Killer from Castlevania, the music from the moon stage of the NES Ducktales game, and Coheed And Cambria's The Ring In Return for assorted other friends. I think my favorite has to be the tone for when my workplace calls - I've got Legend from Chrono Trigger, otherwise known as the main boss theme. It fills me with the right amount of fear of impending doom.
I used to have the Chrono Trigger main theme too. I still have "to far away times" on all calls from the authority - (that means my significant other).
Usually I use Chrono Trigger main theme or the Old Phone ringtone that came with my phone, but I switched it up to the main playing theme to Devil's Crush because it sounds so metal. People constantly ask me what it is. ^_^;;
