Wow, so fvcking hard to decide.
I because it's kinda raw and gritty and dark.
II because it's just powerful kick ass rock with some bluesy harmonica and slide guitar thrown in.
III because it shows a different, softer, acoustic side.
IV because it's the perfect combination of all of the above.
The rest are all great too, but IMO, not quite up to the same level of greatness as the first 4.
I'm gonna have to go with I.
Lots of people talking, few of them know, the soul of a woman was created below.