As someone who likes to sing along to my favorite songs a lot despite my limited vocal capabilities, I think a lot about people's voices. After you listen to particular singers for a long enough time, I find you start to get a real feel for their cadences, tics, quirks, and inflections.
Metallica's James Hetfield
You also start to notice how much they change, sometimes from one album to the next and sometimes over the course of many years due to wear and tear from age, touring, and vices. Some singers have changed their style so much though that they're practically unrecognizable, like this bunch below.More »