I'm not that into ringtones, but for unknown/restricted callers I use a ringtone of "Who can it be now" by Men at Work-it usually gets a giggle or two.

When I set my alarm, I usually use the "Can Can"- that's one loud and annoying ringtone!

RE: nag, nag, nag......You could always search for a soundbite of "Harcourt Fenton Mudd" from the original Star Trek series where the guest (Harry) made robots and they reprogrammed them all to look and sound like his nagging wife....the end shot shows him followed by a whole bunch of them "Harcourt Fenton Mudd, what do you think you're doing.....etc, etc...."