On the other hand, using a default iPhone ringtone means that, if you're in a crowded area, lots of people will check their phones, thinking that they're getting a call, since they use the same ringtone.
If you want a change, you can use a voice recording as your ringtone. OS X Daily recently published a tip explaining how to do this. You record a voice memo, sync it to your Mac, change the extension, then sync it back.
This said, think twice about whether you really want to do this. Because a voice recording could be more annoying than music, to others.

