I have a regular "ring-ring". I don't like ring tones.
This tells me you have no sense of humour and prefer praticality.
I used to have other ring tones:
A fog horn would sound followed "warning, you are stood next to a wanker"
Whoever I was standing next to reacted eithe with laughter or totle disapproval and blocking their kids ears.
I had a manic voice saying "lick me lick me lick me go on it won't damage the screen"
And I had a screaming orgasm one, but that embarrassed me after awhile.